PDF malware analysis — malicious · 0a5e6e59a969326c

MALICIOUS

PDF

85.3 KB Created: 2021-09-04 13:16:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: ddbd0827fb98583738513c1f930bff6f SHA-1: b0945435c820f2d25841d01eee41709d0934889d SHA-256: 0a5e6e59a969326c07602741cab1b01a129b60b90fcfcccfc1cde46dbeeeccf5

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous embedded URLs that point to compromised websites, likely serving as a distribution point for further malicious payloads or phishing pages. The presence of external URIs and link farm heuristics strongly suggests a malicious intent to redirect users to untrusted content.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

Heuristics 6

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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 https://smidgel.ru/uplcv?utm_term=poemele+luminii+lucian+blaga+pdf PDF link annotation
- http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608819470a125---9617256800.pdfIn PDF document text
- http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/e22257d53b01e178276751adb4715942/9535204808.pdfIn PDF document text
- http://www.minaakshimajumdar.com/fckimages/file/29001049146.pdfIn PDF document text
- https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/28d280e6c9a4f174c625419bb87eb031/megema.pdfIn PDF document text
- https://www.idd.no/ckfinder/userfiles/files/sefogobi.pdfIn PDF document text
- https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/931840bfaf1272036b81a26d7516f3e3/nefajasowogokelu.pdfIn PDF document text
- https://www.pactforfamilies.org/ckfinder/userfiles/files/senurebudinejibamirumefok.pdfIn PDF document text
- https://groupburuemas1.com/contents//files/2902834315.pdfIn PDF document text
- https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e50cce9415a---wuvutile.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611a623a5c855---73224926136.pdfIn PDF document text
- https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/c481d1d0deb62dfb33071dc66d36ff55/lizedabakamajevivore.pdfIn PDF document text
- http://ceomit.com/fckupload/file/13579791577.pdfIn PDF document text
- http://superfasttv.com/uploads/files/29811875557.pdfIn PDF document text
- http://anhuishangbiao.com/upload_fck/file/2021-5-20/20210520130941112597.pdfIn PDF document text
- https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/1j6sri5e0gt194fb7e5f2ikufm/fijumilixegebulefiwim.pdfIn PDF document text
- http://toyotarent.hk/FileData/ckfinder/files/20210809_956FA50F14791C30.pdfIn PDF document text
- http://househouse.it/userfiles/files/67685052134.pdfIn PDF document text
- http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd4938be200---pepalit.pdfIn PDF document text
- https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/0n4dg0kouncluof1p7s27nio46/83807389171.pdfIn PDF document text
- https://automatisme-portail-bordazzi.fr/fichiers/69539298752.pdfIn PDF document text
- https://burragebrothers.com/demo/jolie/beta/userfiles/files/pebogixilosujoxad.pdfIn PDF document text
- https://kurtwohndesign.ch/userfiles/files/tunojumudipiperak.pdfIn PDF document text
- http://wchs67.com/clients/f/fd/fd50fd9748f3592dabdfdad26f378f15/File/gigawedixolefabibe.pdfIn PDF document text
- http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/dd7jima4kt4o69ldqi050rq2a4/68819187142.pdfIn PDF document text
- 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_off0000e716.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE716	18404 bytes
SHA-256: `de05a291cd9861d744d214c30de9372f031cd6e682968b660317654878d9d0ef`
`font_01_sfnt_off0001168d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1168D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012ea4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12EA4	10836 bytes
SHA-256: `ca1f4616603a27e9283c13b8dbbfa573eb0262ee77bcc8e8144b8a6bc3b30f93`

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