Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7e37b64c886fb56…

MALICIOUS

PDF

98.8 KB Created: 2021-04-16 11:32:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e4d57a1b7a4e3446fccd432818eb90f5 SHA-1: d8453505d50ffd9303d3b43bd0e6ab9a769f8ced SHA-256: b7e37b64c886fb56e4be128de30e20a4dc8af1e1a6dc857de1b940a8582317b4
134 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. It uses an urgency-based lure. 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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://gimoguvi.ru/strik?utm_term=what+is+the+best+nlp+book PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426269/normal_600280c0965e3.pdfIn PDF document text
    • http://reduslim-siteofficial.site/netgear_wndr3700v3_manual8semw.pdfIn PDF document text
    • http://ekzo-fruit.ru/dikilofilagosevakaroratxop1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391893/normal_602d7212ded66.pdfIn PDF document text
    • http://rotiwopofeze.mywebcommunity.org/fesavowixewaxux.pdfIn PDF document text
    • http://nekidifuton.medianewsonline.com/tevirutolusawinedadasow.pdfIn PDF document text
    • http://pankreatitum.ru/human_anatomy_and_physiology_lab_manual_answer_key_11th_editionh0uwm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385216/normal_604468eb396a6.pdfIn PDF document text
    • http://tipografiyav.moscow/viwagibanaw8hkr.pdfIn PDF document text
    • http://teplotronic.ru/john_deere_6620_combine_engine_sizeyt746.pdfIn PDF document text
    • http://flymoney.net/salirarilzgp6q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378608/normal_606c78fbc7c64.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3680d0f6-ce87-4879-8ef4-66269f5724c1/how_to_live_peaceful_life_with_wife.pdfIn PDF document text
    • http://rojanesifilagu.myartsonline.com/hypothetico_deductive_method.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e709a15b-6834-4c6e-9374-4eb05ae340cb/54998688431.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fe2607a-856b-4aeb-9432-bd99c89354a4/how_to_pair_harman_kardon_lg_headphones.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4402d8fa-05ba-42d0-b871-c2418883861e/88929939816.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f7fc71d-5c77-47c8-9beb-cfcd2422e7dc/lean_mean_fat_reducing_grilling_machine_drip_tray.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8141b9e6-fbbd-4b8e-ae31-39fe7f4ca8af/how_to_maintain_a_dyson_vacuum_cleaner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5550fe2a-182a-45f1-abda-31660cc0dfbc/kimujosokutisiluvejokuk.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001451a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1451A 5028 bytes
SHA-256: 26480f01111fcaaee05b3bcad185b2f8b455a9ca4f94839478958257515579fd
font_01_sfnt_off0001563d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1563D 11844 bytes
SHA-256: 0c4c517197a3094693c2fe9a9c58da67af38db8d7cf722f26a4b80c052352bde

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