Malicious PDF — malware analysis report

Static analysis result for SHA-256 b01c0fb68b599705…

MALICIOUS

PDF

76.5 KB Created: 2021-02-26 15:55:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 0decf80a26b87efd47707e274935618d SHA-1: d654c35dcff307a4314b6434276d41caf22d8348 SHA-256: b01c0fb68b5997051b419180871d66e9ce110fd326bcacdedc4153e403afda5f
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was identified as malicious by ClamAV and an ML classifier, and it contains a large number of external links. These links point to various PDF files hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The presence of numerous external links and the detection by security tools indicate a high likelihood of malicious intent, possibly to distribute further malware or engage in phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/wix?keyword=hempy+bucket+system PDF link annotation
    • http://ital-tess.space/19868656980p0468.pdfIn PDF document text
    • https://tekudijasefemo.weebly.com/uploads/1/3/2/7/132740256/096db1635b4.pdfIn PDF document text
    • https://cdn.sqhk.co/savaketiju/UkDDibt/21899906188.pdfIn PDF document text
    • https://cdn.sqhk.co/sowumavag/jisjb9F/55346501097.pdfIn PDF document text
    • https://cdn.sqhk.co/wanukawuwota/Rha9jc2/3407218961.pdfIn PDF document text
    • https://cdn.sqhk.co/besudamuge/jDjplxx/video_maker_photo_slideshow_music_fotoplay.pdfIn PDF document text
    • http://amaryllis.space/12691744389i5k6u.pdfIn PDF document text
    • http://rostov-mobile-doctor.ru/hangout_app_for_android_phone7u2pq.pdfIn PDF document text
    • https://vawuwoteb.weebly.com/uploads/1/3/0/9/130969488/69ed9cb.pdfIn PDF document text
    • http://doriwev.iblogger.org/luluragelonezamamek.pdfIn PDF document text
    • http://springtea.space/ted_lasso_trailer_song4xswk.pdfIn PDF document text
    • http://vejobazure.22web.org/cool_boy_pictures.pdfIn PDF document text
    • https://muxapikaw.weebly.com/uploads/1/3/5/3/135346573/gomelomodoxelami.pdfIn PDF document text
    • https://zajadibagaku.weebly.com/uploads/1/3/5/3/135341716/topizidevazepog_weruxikuba_kujata_wobedul.pdfIn PDF document text
    • https://cdn.sqhk.co/pegidago/MjePhd2/xamadoxojuxo.pdfIn PDF document text
    • https://cdn.sqhk.co/muvifisi/ez8deii/nomas.pdfIn PDF document text
    • http://remont-kholodilnikov.website/ibps_po_2018_booksxqwi8.pdfIn PDF document text
    • https://cdn.sqhk.co/monazaxumol/j3IB8hh/paromo.pdfIn PDF document text
    • http://dawavuwera.22web.org/brinkmann_electric_smoker_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/teposodigar/Txhf3if/nick_s_bar_and_grill_menu_clive_ia.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF084 5008 bytes
SHA-256: bf84f8918341a9d3b90d2a01b6f3f06b9e4f8d7afcb4393a4711ac71810a7b5a
font_01_sfnt_off00010188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10188 10472 bytes
SHA-256: 008474b5ea66034cd8df4c04a6ad9ccd64ea720ef7ebb0c5b25b1efab71958da

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