PDF malware analysis — malicious · dee03f925b671a38

MALICIOUS

PDF

90.6 KB Created: 2021-06-29 12:47:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 9f1782435957d37ba0bcdf65ca8b8e92 SHA-1: 8c3776073bea481c359682d4ef560745af0c52fc SHA-256: dee03f925b671a38b30a2f8445a526c7e98fe7d66fab4f048d3c38f2ef121f8c

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, indicating an attempt to redirect users to malicious content. The presence of 'cmd08vvcjlls6d92ofg81/lefelikalukiwe.pdf' in the document text suggests an attempt to disguise malicious links.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND

Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://myucmas.com/userfiles/file/97009223204.pdf In PDF document text
- https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/81av4rqekaioc9if2k56kv62q1/57539383827.pdfIn PDF document text
- https://travelstore.tn/userfiles/file/ridefepuzidexi.pdfIn PDF document text
- http://www.aadhar-interior.com/userfiles/file/farewij.pdfIn PDF document text
- http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac67f2d1eb5---mokatu.pdfIn PDF document text
- http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9d01896755---90666094643.pdfIn PDF document text
- https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/89268fd00549ecdb1524af35a14a0cd8/xilelomegomomap.pdfIn PDF document text
- https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/1271aa71bac4f2a17c83bf371f227078/34479678352.pdfIn PDF document text
- https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/dp3431rj6iser1k5e3hng4o3c7/dupusukitunojeduveki.pdfIn PDF document text
- https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/b6e9a92eda7147ed70cf5e39bb4b0d7e/tademugasilexafeb.pdfIn PDF document text
- https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a468ec2da---65001986405.pdfIn PDF document text
- https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160737336d9f22---8343702096.pdfIn PDF document text
- http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090e104d5759---26673221653.pdfIn PDF document text
- https://proxus.nl/file/40624472300.pdfIn PDF document text
- http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d354c7eddd---18149023206.pdfIn PDF document text
- https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c8fb691048b---zoweju.pdfIn PDF document text
- http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075768b5138d---sipobufuferujugawitaza.pdfIn PDF document text
- https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/143c0c3437825a71f4b1326ebb8bed02/62104733912.pdfIn PDF document text
- https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/8f9ce55c3dcf74cfd115f15939176fae/13971895449.pdfIn PDF document text
- https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/fb18bbe128bfb16dbc437764c8917f69/nelipexudewirojafizefuguv.pdfIn PDF document text
- http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/71sjd50mi2hkvf7nraeblqq627/73920352537.pdfIn PDF document text
- https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/bb7mfcmd08vvcjlls6d92ofg81/lefelikalukiwe.pdfIn PDF document text
- https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/92212529666.pdfIn PDF document text
- https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16079acb1bd925---54486210328.pdfIn PDF document text
- http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae344408fae---jajegovexukewepalidejazo.pdfIn PDF document text
- https://www.beewellIn macro / runtime command snippet
- https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=kernel+and+shellPDF link annotation
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000fbae.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFBAE	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000113c0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x113C0	19552 bytes
SHA-256: `2599d6da0b45d1c327d0c84a174da7e7de40b2f34ca5e2fbecae7c12b311ef9a`
`font_02_sfnt_off000145ea.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x145EA	10024 bytes
SHA-256: `71828b5c716de3b727c119173b3aa008561f248a486778fb057d74606765ddeb`

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