Malicious PDF — malware analysis report

Static analysis result for SHA-256 94c45fc561d66c0f…

MALICIOUS

PDF

91.4 KB Created: 2021-02-15 11:49:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 67b21c9d5527deab1111e39658c67352 SHA-1: f5bc76c1c150dc1edee60a5af35d62286fc39d42 SHA-256: 94c45fc561d66c0f459dd8650c6ba3b4fcbf29c4b61c7d3a8b38970058eab829
224 Risk Score

Malware Insights

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

This PDF file exhibits multiple indicators of malicious activity, including a critical heuristic firing for brand-impersonation credential phishing, specifically impersonating Facebook. The document also contains urgency lures and a large number of external links, suggesting a link farm or phishing campaign. The presence of embedded URLs and the ML classifier's high confidence score further support its malicious nature. The file likely serves as a lure to direct users to malicious sites for credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://napopetonepew.weebly.com/uploads/1/3/1/1/131164038/kogijedetego_fuwunosegex_xotuviv_ramujedapexe.pdf.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://maypoin.ru/123?utm_term=how+to+write+a+summary+paragraph+4th+grade PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4385410/normal_5fe4ae661bb7a.pdfIn PDF document text
    • https://napopetonepew.weebly.com/uploads/1/3/1/1/131164038/kogijedetego_fuwunosegex_xotuviv_ramujedapexe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426263/normal_5ffe413a1479b.pdfIn PDF document text
    • https://zirofapenepag.weebly.com/uploads/1/3/4/8/134855920/948e8842d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481403/normal_5fefdfd7cf2cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423195/normal_60167f00b044f.pdfIn PDF document text
    • https://xekukagakodepa.weebly.com/uploads/1/3/3/9/133999272/dagujabepedixo.pdfIn PDF document text
    • http://shoop-ft.ru/pukebinedewekevekar20gi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375698/normal_601235d9186ed.pdfIn PDF document text
    • https://zukutalemuz.weebly.com/uploads/1/3/4/5/134582669/puwujigapa_zoruxoluj_diwunavij.pdfIn PDF document text
    • http://pimebujeben.66ghz.com/corporate_video_script_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417308/normal_5fe982ea462c1.pdfIn PDF document text
    • http://urologo.store/dashboard_excel_spreadsheet6wh3v.pdfIn PDF document text
    • https://bodonovovo.weebly.com/uploads/1/3/1/6/131607174/4157728.pdfIn PDF document text
    • https://pixipemojawipe.weebly.com/uploads/1/3/4/4/134459682/jokotu.pdfIn PDF document text
    • https://wonuxomi.weebly.com/uploads/1/3/1/0/131070523/5e2b49d936c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368238/normal_601e9810a688f.pdfIn PDF document text
    • https://wozibasibif.weebly.com/uploads/1/3/4/8/134868806/ginurexexeborure.pdfIn PDF document text
    • http://prod-fruit.space/xegojiselowl3v.pdfIn PDF document text
    • http://belplitka.ru/my_dream_lottery_home_davidupewh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470232/normal_5fc7dd6147577.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
    • http://lirofad.epizy.com/madufemaderakivifelofugal.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BE 5360 bytes
SHA-256: 7e052f9f134b10329ab74d60dd0f18f0c6b76b7f58430f7a4628705cbd73ad7e
font_01_sfnt_off00011713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11713 10900 bytes
SHA-256: ae7bc5f640c8a688790a578a4f069863a4ee71326b041b6eb84ee54dcffc224b
font_02_sfnt_off00013c57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C57 16064 bytes
SHA-256: c6ac4a84b806783e63ed337407dfaf73f0da8c9c1108f85aaf60181f94c2b64b
font_03_sfnt_off000150f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150F0 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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