Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f980ab71ea84b98…

MALICIOUS

PDF

76.6 KB Created: 2021-03-09 03:34:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 903f124fd98043bf496cb6c94c30c730 SHA-1: 9f2b493df8bfd47e2288a52e61ae1436e1f03a51 SHA-256: 4f980ab71ea84b98121f80625fb5ca7d4510737f11f761b98b428317b62667ac
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://baarspo.ru/strik?utm_term=math+problem+solving+rubric+5th+grade PDF link annotation
    • https://fuvapevamasazu.weebly.com/uploads/1/3/4/5/134507747/sepano-zikun-pevopikosexuwi-katiponu.pdfIn PDF document text
    • https://sovopedu.weebly.com/uploads/1/3/5/3/135301682/6487622.pdfIn PDF document text
    • https://xokefinodoju.weebly.com/uploads/1/3/5/3/135316617/de1f611.pdfIn PDF document text
    • https://nefawuwezogixo.weebly.com/uploads/1/3/1/1/131163734/abe29490465c02.pdfIn PDF document text
    • https://rorekejufekate.weebly.com/uploads/1/3/0/7/130740186/3210093.pdfIn PDF document text
    • https://vapesokon.weebly.com/uploads/1/3/4/3/134329795/rezemekiko-fodogino-rizijusokowi.pdfIn PDF document text
    • https://noginoludaven.weebly.com/uploads/1/3/4/3/134374582/2051631.pdfIn PDF document text
    • https://sajakuvidosub.weebly.com/uploads/1/3/4/4/134496924/sukevufajisidazame.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vanatul/greatest_weakness_answer_to_interview_question.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/jegeji.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/safety_1st_ear_thermometer_change_from_celsius_to_fahrenheit.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/project_management_skills_summary_resume.pdfIn PDF document text
    • https://44eeb0f0-4dc9-4d8b-b3fd-cc7ace98e90e.filesusr.com/ugd/a083a1_b7ac0eb50902483c8072d0ef49e75aa5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/desert_island_survival_guide.pdfIn PDF document text
    • https://99470c7d-c692-4648-a7b8-36ea19db2883.filesusr.com/ugd/ab059d_ae8cfc853cc648b7897e6c933c3deb5d.pdf?index=trueIn PDF document text
    • http://legopabez.rf.gd/68631421629.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/zofefutilofodoxisa.pdfIn PDF document text
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_b4b858b241d0412bb10d571d174563d6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pazovugal/salaam_rocky_bhai_telugu_song_ringtone.pdfIn PDF document text
    • https://6eed613e-cbae-405e-b458-9655ef9033f8.filesusr.com/ugd/e4f6f0_24257dd667d546e4bda473d31b4f5ca0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/57614373552.pdfIn PDF document text
    • http://xeziribosivamis.epizy.com/22269031688.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/uc_browser_free_apk_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/96034732981.pdfIn PDF document text
    • http://pumumiz.epizy.com/63878870359.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED29 5816 bytes
SHA-256: f0cfda006dd6b0d9406a7027424dee4bfb828f074ee903435d91eea74b55962c
font_01_sfnt_off000100e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E1 10624 bytes
SHA-256: 67a57d1b14cd2fa572084d84de87f7c08622e52326c3bb09e300452b176d7b11

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