Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa9ab5f747a36cba…

MALICIOUS

PDF

76.0 KB Created: 2021-02-15 22:52:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e0bdaf4c79c4645f7d46f188a835589e SHA-1: 9343c7743a0b2c308edb850842d133ce230d0e41 SHA-256: aa9ab5f747a36cba350eca63a04a881d8ba472239af668200223eaa997fa8ef1
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 0.9998

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://jacksth.ru/123?utm_term=will+30+minutes+of+exercise+a+day+make+a+difference PDF link annotation
    • https://revotilam.weebly.com/uploads/1/3/4/7/134732497/zabipafave.pdfIn PDF document text
    • https://pamuguvijokogag.weebly.com/uploads/1/3/4/8/134883264/jagatufekamo.pdfIn PDF document text
    • https://vuverararusug.weebly.com/uploads/1/3/4/8/134883490/4664226.pdfIn PDF document text
    • https://medisavepa.weebly.com/uploads/1/3/0/8/130815026/dunidonuzira.pdfIn PDF document text
    • http://rm-swis-mine.com/53545060680ocgz9.pdfIn PDF document text
    • https://kitopelok.weebly.com/uploads/1/3/4/3/134355781/1893296.pdfIn PDF document text
    • http://xozonline.ru/579603645504i0cz.pdfIn PDF document text
    • http://nuxefigemotak.22web.org/ketalafigejok.pdfIn PDF document text
    • http://flowerport.store/87435132424gedos.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/mipeboro/3869351673.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/devenotezufujotuwi.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/30688122399.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/feselabowopalurir.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/corbett_maths_5_a_day_answers_february.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/79097682486.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/approximation_theory_and_methods_powell.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/16692659121.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/goxewafunetatajekug.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6D 5604 bytes
SHA-256: d3f8dd245190dbfbb3cc7e468fcbc82e2980635f5101204e350dde89bd7cecdd
font_01_sfnt_off0000f075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF075 10336 bytes
SHA-256: b28065fef1821f772f53ea51cbdaf27efa8e58d3c757164c30c749c6995249f7
font_02_sfnt_off000113cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113CF 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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