PDF malware analysis — malicious · c6ab107442cbcd52

MALICIOUS

PDF

85.7 KB Created: 2021-07-19 12:53:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 1f9c648797c75b0cf2d78c85fb30b4b8 SHA-1: 5e3a9af843498214589b74ea464f1b067fd99473 SHA-256: c6ab107442cbcd52df008a6605443bd88983bb9b5f555e3c0ff62a36e4401f79

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It functions as a link farm, directing users to multiple compromised WordPress upload storage locations and other disposable hosting domains. The primary goal appears to be to host malicious PDFs or redirect users to further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9849

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 http://buergerforum-tirol.at/file/tokilazobibimodoxogojiv.pdf In PDF document text
- https://vsetinrally.cz/userfiles/file/64281981143.pdfIn PDF document text
- https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b5554610b07---jewoxi.pdfIn PDF document text
- https://bilalyapidekorasyon.com/userfiles/file/buselapajuzigunebawo.pdfIn PDF document text
- https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16087a722d3e51---34757147100.pdfIn PDF document text
- http://pincailight.com/zk/UploadFile/file/2021070219070773499.pdfIn PDF document text
- http://seabeachthailand.com/UserFiles/file/3581294038.pdfIn PDF document text
- http://charivne.info/images/file/30581710066.pdfIn PDF document text
- http://museeducuir.org/upload/files/40530364972.pdfIn PDF document text
- http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078af8029e56---piwosuvemavate.pdfIn PDF document text
- https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/j8hmi8gn0c7mmesibnkg5voevl/bizewezukes.pdfIn PDF document text
- http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8aafcfb8a---nelamunizonixajime.pdfIn PDF document text
- http://broeinest.org/ckfinder/userfiles/files/27358701205.pdfIn PDF document text
- https://publicbridge.pl/userfiles/file/71375610556.pdfIn PDF document text
- http://khodahoanglang.com/admin/webroot/upload/image/files/3719872191.pdfIn PDF document text
- https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2b61da8c4d---tifoponimitemaxozimifu.pdfIn PDF document text
- https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/b1ae7146c9b9fdce8453ec829c000970/57389049932.pdfIn PDF document text
- http://www.motionmantra.com/userfiles/files/vivekul.pdfIn PDF document text
- https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/b2e238a87217e5c03e294ba9547f5b52/wusetu.pdfIn PDF document text
- https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/s75s8j5n6qrto85hurl5u73q5d/41048401407.pdfIn PDF document text
- http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16076de4ee0a8e---19763604822.pdfIn PDF document text
- http://akkoryazilim.com/userfiles/file/7663025583.pdfIn PDF document text
- https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/8cf3eb1bda1d1b7609e9136e4e84b621/50633719790.pdfIn PDF document text
- http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/fimine.pdfIn PDF document text
- https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/8c720d37575302018dc078507584f71c/79800302855.pdfIn PDF document text
- http://myshopgroup.com/userfiles/files/75432258663.pdfIn PDF document text
- http://xn--l3cbpp3gh4a5g5c.com/userfiles/files/gagofowekixejuwotuwav.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=3+year+old+aspergersPDF 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_off0000eec2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEEC2	10460 bytes
SHA-256: `e1badbf30ae9efe8a31e72a3f49ed3cb5095e9d445444712f96e42f8f0c8e435`
`font_01_sfnt_off0001065e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1065E	16676 bytes
SHA-256: `2c4554ab5c7481fa8136f0a8ada3e324f1e813b7fc06c741f7ca2e641a30f236`
`font_02_sfnt_off000131ab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x131AB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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