Malicious PDF — malware analysis report

Static analysis result for SHA-256 9540f6aaa90c943b…

MALICIOUS

PDF

102.3 KB Created: 2021-01-24 02:28:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 87106bb9c159d5ec553f7538e253612a SHA-1: b6afac728e8a39475d30c56195753edc4c747d07 SHA-256: 9540f6aaa90c943b55161e072b53f70ecf0750024264136c409cf5a7cab4f402
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, suggesting a link farm or redirection mechanism to host malicious content. The primary URL, 'https://trafficel.ru/wb?keyword=itrust%20pro%20look%20like%20a%20program', is likely used to direct users to a malicious site, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafficel.ru/wb?keyword=itrust%20pro%20look%20like%20a%20program PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4455185/normal_600cb590e4ac3.pdfIn PDF document text
    • https://monijakuxit.weebly.com/uploads/1/3/4/3/134362478/najumed.pdfIn PDF document text
    • https://wavimukuwu.weebly.com/uploads/1/3/0/8/130874629/1072270.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424013/normal_5feb003ddf406.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369522/normal_5feb77cb97102.pdfIn PDF document text
    • https://wabezapodila.weebly.com/uploads/1/3/1/4/131437306/a5eb448f6055.pdfIn PDF document text
    • https://resodapiperuxa.weebly.com/uploads/1/3/1/4/131407292/6666338.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403820/normal_60028a9e22d8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480598/normal_600c193911fc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379611/normal_5fd7c366d1d10.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lotibabakuj/map_of_usa.pdfIn PDF document text
    • https://s3.amazonaws.com/tumuzu/segidetijarujamezegufeza.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/hardest_questions_to_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/physics_book_for_css.pdfIn PDF document text
    • http://fiwemigusa.rf.gd/46775575359.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/bootstrap_3_theme_template.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/edmodo_for_laptop.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/kaspersky_battery_life_apk_mod.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000145e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145E0 4916 bytes
SHA-256: 5277a74c9dda4ded5b5585e8db8fc4c4825a3d5bce119c6f8efd51290a92c225
font_01_sfnt_off000156a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156A0 11384 bytes
SHA-256: 15d7310438b01f951afb8e34edb1e65e061b2ba11b88bf76f2fb16fb34cb2a9a
font_02_sfnt_off00017d95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D95 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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