Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd74264b38dbcd2a…

MALICIOUS

PDF

79.0 KB Created: 2021-04-06 02:37:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f3e1710428f2f5ed4f39a377551961a SHA-1: 265c7172ff2e6c92e891bca9e55fb4796321d8b2 SHA-256: bd74264b38dbcd2adf9d0b8d57f5786305b89603d8a3d3eb5ebc43500dc62e8e
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a malicious document designed to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/wix?keyword=good+thoughts+good+words+good+deeds+zoroastrianism
    • https://zivumipit.weebly.com/uploads/1/3/4/3/134317334/golat.pdf
    • http://kiluzilaw.sportsontheweb.net/duladire.pdf
    • https://nagewapebikex.weebly.com/uploads/1/3/4/6/134647925/xeleruniwod-tibuj-suxunalarof.pdf
    • https://rorenaziva.weebly.com/uploads/1/3/1/8/131871817/fcd424e8.pdf
    • http://govnosiakxws.online/jatuxubeviposuxowojakepi2qi.pdf
    • https://wutikivefuripiz.weebly.com/uploads/1/3/4/6/134662644/wopuninavadobikod.pdf
    • http://zukirudon.mypressonline.com/tuxekowepomoxoninadinur.pdf
    • https://xobopigo.weebly.com/uploads/1/3/1/4/131437845/xemilapedanabo.pdf
    • http://idealica-itufficiale.website/wotesadubulwp367.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zepizevut.atwebpages.com/ielts_speaking_questions_part_1_2_3.pdf
    • http://vutakeba.epizy.com/affinity_photo_for_ipad_manual.pdf
    • http://rapudipawuv.epizy.com/make_your_own_market_stall.pdf
    • https://76df98a8-3e94-4eee-a6f5-23e1de06049b.filesusr.com/ugd/54c74c_679d073c2953423caec319470b09549f.pdf?index=true
    • http://genenapukiral.epizy.com/digital_electronics_lab_manual_free_download.pdf
    • https://89d37d93-eaf9-4fc7-8d5e-07438b8f18e7.filesusr.com/ugd/e80f4c_50fef24aa2fa4522b879fdc7d6e4fdb5.pdf?index=true
    • http://sojufuka.atwebpages.com/21717310659.pdf
    • https://24a70dd4-b549-4b9e-9c0a-6eea45ab85ad.filesusr.com/ugd/ab0c63_0aebbaedbe0442f7b3d94c006d84a167.pdf?index=true
    • http://guxejusoselota.myartsonline.com/bibadoxela.pdf
    • https://7be8961d-effb-4c78-a255-78c3c9f0be09.filesusr.com/ugd/3dd68e_83a553a542fa475f8bb8e496625995f5.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f727.bin
960270fc375f3d9dbc45b4c7114ba2c522ad6203099153b06077c6bef9f326a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF727 5380 bytes
font_01_sfnt_off00010963.bin
d882a5884e098e43440589f89f42ce8cdc107b90cd51bfb19f41270fbdccdd1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10963 10836 bytes

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