Malicious PDF — malware analysis report

Static analysis result for SHA-256 60637f03d1c4d234…

MALICIOUS

PDF

85.1 KB Created: 2021-03-18 13:46:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ecbacef665ce7dcb9084fdc1a33eb9b5 SHA-1: 9b5c8626ffe8d21f94cbc2f1e73df361c0279192 SHA-256: 60637f03d1c4d2344e36ffd39bfbca9ba7831742d25deb9b29043eac7f689514
186 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 0.9990

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
  • 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.
  • 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 https://kuzutuzo.ru/123?utm_term=candy+crush+saga+hack+version+apk PDF link annotation
    • https://tonezesonor.weebly.com/uploads/1/3/2/6/132681734/xezunefit_fukijigewi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470540/normal_5ff82e3444b67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464053/normal_5fd6465881788.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412568/normal_6041791967368.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449777/normal_5fcbd1eb36867.pdfIn PDF document text
    • https://fowazukogapepeg.weebly.com/uploads/1/3/0/8/130873990/bebuvizumalibanu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418001/normal_6022db1f44d89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383582/normal_600e3eb0e0912.pdfIn PDF document text
    • https://bodonoweti.weebly.com/uploads/1/3/1/8/131856710/zikodib_rowafiluxuxafuf_mejumox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489428/normal_60200c07ae1da.pdfIn PDF document text
    • http://gikodarekegov.mywebcommunity.org/biblia_version_latinoamericana.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408983/normal_5fe1ce13520d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405194/normal_6041884a560ce.pdfIn PDF document text
    • https://tesazosutev.weebly.com/uploads/1/3/4/7/134714215/lurekidozodav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c2093f15-f4fb-4bda-9582-db5404103fa6.filesusr.com/ugd/b28561_e4b5a036901947f99f3f5a15d96678b7.pdf?index=trueIn PDF document text
    • https://7404da97-7fcf-4d5f-9d5f-3f8644e6773a.filesusr.com/ugd/35f767_e27675457eb341828a4f4851ccaf0fbd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pujirageg/cracked_play_store_installer_apk.pdfIn PDF document text
    • http://roveramo.atwebpages.com/60482420010.pdfIn PDF document text
    • http://sitafefisoju.atwebpages.com/visavovixodikavo.pdfIn PDF document text
    • https://4bd9ed84-c80b-4837-bb2f-b1353ebfd8aa.filesusr.com/ugd/5a1791_820195170b24427596f66c2b7255feb8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/15891162563.pdfIn PDF document text
    • https://92fed17e-af34-466b-b3fe-38cd9ef27699.filesusr.com/ugd/192d58_8ba9d6980d9c405982212e3496d652c7.pdf?index=trueIn PDF document text
    • https://9fd4a267-a675-4462-b2a8-34848e7262be.filesusr.com/ugd/3835dd_ec848d75ec5e477c8f656f588ec1ded3.pdf?index=trueIn PDF document text
    • http://letutemoxeluz.onlinewebshop.net/60118780444.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF808 5436 bytes
SHA-256: c335d5b10d5919be66885a310791fd3d787fdda760675ada271283eac676f8a8
font_01_sfnt_off00010a8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8A 11000 bytes
SHA-256: 250ba6c0d18c8e287e70f968b072c9fb588299870a312422d6c3cd773dc3d49d
font_02_sfnt_off00013048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13048 16660 bytes
SHA-256: 71fe66e8a900eabe62c773f6b9b467243c87e6d484dd0ea34a22194082714177