Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d97d647bec5c7f1…

MALICIOUS

PDF

77.3 KB Created: 2021-03-13 16:43:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 2b7e9a093048984b580d1f99c1a8cc63 SHA-1: 3e071c6ab5a32448881e772d52297b9da9314f27 SHA-256: 3d97d647bec5c7f1f49899f8c13c840a2017ced5029a5961e5649a79ba0dc1dd
226 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a malicious SEO link farm, containing numerous external links likely intended to manipulate search engine rankings or redirect users to malicious content. The presence of a password-protected archive lure suggests an attempt to bypass security scanning by encrypting the actual payload. While no scripts were directly extracted, the PDF structure and URL patterns strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://kuzutuzo.ru/strik?utm_term=is+ashes+to+ashes+on+netflix PDF link annotation
    • https://cdn.sqhk.co/berazanoga/fhd48jD/64621966099.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxozowaki/tPDgeZt/capsicum_vs_bell_pepper.pdfIn PDF document text
    • https://xovonanukotu.weebly.com/uploads/1/3/4/8/134898985/lulokowo-vakozi-dupejizeme-fofewaremew.pdfIn PDF document text
    • https://cdn.sqhk.co/jobalafefi/Ogikfgh/76929194069.pdfIn PDF document text
    • https://vubeluzuge.weebly.com/uploads/1/3/4/3/134357782/rarokumatemon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446915/normal_602b759378bea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460070/normal_60158104dbbd9.pdfIn PDF document text
    • https://cdn.sqhk.co/muribirigim/zihmjbu/82612370276.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402533/normal_5fded0716174b.pdfIn PDF document text
    • https://cdn.sqhk.co/fapetemiji/hi8mIhg/monster_fishing_legends.pdfIn PDF document text
    • https://fugomunufu.weebly.com/uploads/1/3/4/5/134586131/c0d4227fd31.pdfIn PDF document text
    • https://cdn.sqhk.co/lorotukogof/AkS4geO/87691594662.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464527/normal_5fe94f5ab7350.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505839/normal_5ff36831d1589.pdfIn PDF document text
    • https://cdn.sqhk.co/tejikeluz/bKhiRdH/traincontroller_8._0_gold_crack.pdfIn PDF document text
    • https://cdn.sqhk.co/sedefoken/ieROjjv/76535857456.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/gefedujufunalawafen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af3de1a3-d531-44a0-a3ce-9d2e4df198b5/somor.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/florida_citrus_budwood_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/befd9307-196a-4b19-8f7b-b57db75493fd/what_costs_should_be_capitalized_when_purchasing_land.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ce7f74f-bbe1-4f57-a2d6-e8da45316787/sonic_boom_alarm_clock_with_bed_shaker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ba4b94e-d581-4a13-b9fa-0f78e4caa359/internal_combustion_engine_efficiency_curve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d88957df-0394-491f-866d-65d38e0f4032/dlink_router_admin_password_not_working.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C3 4764 bytes
SHA-256: 69fdc8a87cc06959bf0395cd0627ea600b7bba14bc8d548a22671b7e80a6abba
font_01_sfnt_off000102fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102FD 10844 bytes
SHA-256: 09f869baa29dd18ea31f978958f1fe1a8e1deae1553271136988951028e7f5f5

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