Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e3fe8bdb4c05837…

MALICIOUS

PDF

79.4 KB Created: 2021-03-28 22:05:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f8c1c1cba1ed758c8f6ce32b363dafca SHA-1: da190aaccaf13239948d0a7984865bafe709a50e SHA-256: 2e3fe8bdb4c058377acbefeb86fae858da18a9b7bf33dfeeefe2f94a44065852
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 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://ponafet.ru/award?keyword=laser+doppler+anemometer+pdf PDF link annotation
    • https://cdn.sqhk.co/gukituzaju/hyihgdj/age_of_empires_2_strategy_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/toliximozupa/jdjdIB6/92820341325.pdfIn PDF document text
    • http://instacopyrighthelpteam.com/29900881180paaut.pdfIn PDF document text
    • https://bumarotijij.weebly.com/uploads/1/3/4/6/134688095/rutolof.pdfIn PDF document text
    • https://cdn.sqhk.co/jumibizede/doge9fd/disneyland_resort_paris_case_study_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/sifajoxojif/Ljdltie/indycar_tv_schedule_2020_revised.pdfIn PDF document text
    • https://bivitomelonex.weebly.com/uploads/1/3/4/4/134491730/vutujozo.pdfIn PDF document text
    • http://de-bewertung-id2842384.icu/chamberlain_41a5021-1f_partscfeja.pdfIn PDF document text
    • http://lusidupasikox.iblogger.org/5140416198.pdfIn PDF document text
    • https://cdn.sqhk.co/pamezuravuno/jbAGghC/tujuan_kurikulum_pendidikan_islam.pdfIn PDF document text
    • https://xilivixawigilu.weebly.com/uploads/1/3/4/6/134672458/2303822.pdfIn PDF document text
    • https://cdn.sqhk.co/gugusobazu/iaEHvCY/download_head_ball_2_for_pc.pdfIn PDF document text
    • http://islemleriniz.org/why_is_my_router_not_working_with_my_modemnemy8.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://uploads.strikinglycdn.com/files/51d4e8d4-316b-4136-b8ee-36e7c0d2b337/numis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b03b9bf3-b32e-4b64-bd31-31d15d34107b/wukedemaxoduzutowuvado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82f35f86-3c89-45fa-a756-4b5d47795cc3/whirlpool_duet_front_load_washer_parts_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34734774-fee1-4e65-b38e-5fe0f94d97d3/bedojalatuzupat.pdfIn PDF document text
    • http://zorogeloma.epizy.com/minapuziji.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED27 4868 bytes
SHA-256: afdd05da7633254de3ed458b4f499f2ce1e0427db96f99d4dfd908f7ccc3d8f3
font_01_sfnt_off0000fd92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD92 10684 bytes
SHA-256: cc67d17bca182898d96c0b920c1d4d767396b768db84165bad104b4a2545f875
font_02_sfnt_off000121ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121FF 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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