Malicious PDF — malware analysis report

Static analysis result for SHA-256 89deafb148142d03…

MALICIOUS

PDF

88.0 KB Created: 2021-04-04 03:27:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2e59a045cf0b948a9f41d4cc6803d238 SHA-1: 06754bbd901ce6454a92405f982cc152d07c34d7 SHA-256: 89deafb148142d035c6a56a05f96e13a830fcb567dfb143789f85803ea4e1e2f
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body and embedded URLs suggest a lure for downloading a specific PDF, likely a phishing or scam tactic. While no scripts were directly extracted, the PDF structure and embedded links point towards a potential exploit or redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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 http://musomojil.mywebcommunity.org/49964965070.pdf In PDF document text
    • https://jirafaribov.weebly.com/uploads/1/3/4/5/134599686/a51b6b.pdfIn PDF document text
    • http://xabidakidu.iblogger.org/bleomicina_efectos_secundarios.pdfIn PDF document text
    • https://soregekewo.weebly.com/uploads/1/3/4/2/134266411/8743000.pdfIn PDF document text
    • http://werikipirojenob.scienceontheweb.net/bebarurilafamojepiwo.pdfIn PDF document text
    • http://nopotaz.medianewsonline.com/how_to_speak_with_a_british_accent_tutorial.pdfIn PDF document text
    • https://girawosanisab.weebly.com/uploads/1/3/0/7/130740609/2134734.pdfIn PDF document text
    • http://jopagozopive.medianewsonline.com/what_is_unique_student_identifier.pdfIn PDF document text
    • http://parawabasufubep.iblogger.org/95146004933.pdfIn PDF document text
    • http://fofolep.mywebcommunity.org/sowesadumeripibugok.pdfIn PDF document text
    • http://dubiniba.iblogger.org/xewukezafogupixakamosilog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/Infin/~3/8s7IOTYTxRI/infin?utm_term=bidayatul+mujtahid+urdu+pdf+free+downloadPDF link annotation
    • http://joxumokuri.epizy.com/cute_binder_cover_template.pdfIn PDF document text
    • http://tinosizifaxuful.epizy.com/woodchuck_could_chuck_wood_answer.pdfIn PDF document text
    • http://fetelezazojidi.rf.gd/88117829758.pdfIn PDF document text
    • http://gikisomu.epizy.com/lusogumideg.pdfIn PDF document text
    • http://finubovuputok.epizy.com/zoology_books_free_download.pdfIn PDF document text
    • http://tafinefonekon.rf.gd/vidmate_app_apk_version.pdfIn PDF document text
    • https://626fb5af-1d67-41cb-86ce-204163677ff0.filesusr.com/ugd/9d869b_49442ffd2eac4c13bc2d09a63f1acba7.pdf?index=trueIn PDF document text
    • https://235be7ff-9b22-41de-91df-7a9e5ced5199.filesusr.com/ugd/4fa465_1eacde10c54548e1a805a2ee62602854.pdf?index=trueIn PDF document text
    • http://gazezubutajon.rf.gd/business_english_conversation_worksheets.pdfIn PDF document text
    • https://fe92b815-f0fe-4223-924b-659339f44b90.filesusr.com/ugd/8f64fc_973190f5016744859c172eb8e90f83ae.pdf?index=trueIn PDF document text
    • https://7c9e9c40-2b96-4f88-8065-b5ff5e495659.filesusr.com/ugd/3bfcae_1c30743b8f154d49805248da3a73d5f1.pdf?index=trueIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00012ce7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12CE7 21476 bytes
SHA-256: 98e06686c88609e3412676c40cd7ecb059cdbe4a9322e7c6e54a9ce80b5c2a8f
font_00_sfnt_off0000f1fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FC 5420 bytes
SHA-256: 4a28b97f00eec5e54ecd7d196068b55f2bcd0f3c87656de9ad728483420cd062
font_01_sfnt_off0001045c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045C 11908 bytes
SHA-256: ed14d15df20892d50e5f78af16c30578c8a28ec33cbd90b77c1ada309cbde7bb