Malicious PDF — malware analysis report

Static analysis result for SHA-256 92809234ed53ad9f…

MALICIOUS

PDF

77.1 KB Created: 2021-03-12 11:44:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 20e015ff48874fcc33d1b458a2e18d4c SHA-1: 27767fd95f69172a2bd83547de8310bc667130d0 SHA-256: 92809234ed53ad9f8bf768fbd8ae0ee437e1b084d8c7f1a833c7a0bc452fb25b
156 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 0.9997

Heuristics 5

  • 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.
  • 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://xezojetit.ru/wix?keyword=the+alabaster+girl+pdf PDF link annotation
    • http://makeyourself.xyz/fastest_bowling_ball_speed_records1eug.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxosutuku/f7iePyt/face_mask_required_sign_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/lapitobexeva/Kii4jcP/bovidorusewolutudirewol.pdfIn PDF document text
    • https://cdn.sqhk.co/jimatoju/d8jbjeK/lokudar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393898/normal_5fcee43f86fdb.pdfIn PDF document text
    • https://cdn.sqhk.co/moleselofa/ijjhpZR/deathworm_ark_location.pdfIn PDF document text
    • https://cdn.sqhk.co/zatuwifezub/8XKoNih/thomas_friends_adventures_to_share.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470689/normal_5fcc9e0498f05.pdfIn PDF document text
    • http://vannabanyavsedela.xyz/ruguzajimugemolesezusakawlvprm.pdfIn PDF document text
    • https://cdn.sqhk.co/mudonisogub/Ml3ibgM/19202284858.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367644/normal_600590e3c5653.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/fqhbjh4/is_cards_mobile_wallet_safe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403807/normal_5ff567a7d9fd6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421624/normal_5fc6a35a642f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379611/normal_60128832630e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471958/normal_5fcc0047e5e83.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopaji/atjiRhd/funny_valentines_gift_ideas_for_him.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403673/normal_6029d62acedad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5e73d190-47a4-4ead-99bf-7e9069f06a16.filesusr.com/ugd/55cc32_5b4213c306da4a17b3da2db1e1d37c04.pdf?index=trueIn PDF document text
    • https://a161ff94-1a6f-4367-b6f8-8e513a5e676d.filesusr.com/ugd/4c7633_362a44b320dd4868a4f9ef3b99a98f57.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF185 5392 bytes
SHA-256: cf36186988abd77597f3a1027854ecb768bf416ecccb3e098bb2d0ed61d0021e
font_01_sfnt_off000103c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C9 10440 bytes
SHA-256: a148d8be6ee37ed6489226e5d1c31ea802ce6ca90096f9555d870aa6bc461c82

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