Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bb7f786b1c344c4…

MALICIOUS

PDF

81.0 KB Created: 2021-03-09 15:26:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 71e8a549664d624c4b4727b66b8628ec SHA-1: 9dc242a6a7593969db0bd10221145dfac4638faa SHA-256: 4bb7f786b1c344c4050e88fb6e25362b0d466033d7e8a8d27027778ceeb110d6
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including ML classification and specific rules for advance-fee scams and brand-impersonation credential phishing. The document contains numerous embedded URLs pointing to disposable hosting and redirectors, suggesting an attempt to lure the user to a malicious site. The presence of these links and the nature of the heuristics strongly indicate a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://kovorugoza.weebly.com/uploads/1/3/1/3/131383314/godulusefu.pdf.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://leonvi.ru/award?keyword=social+security+administration+act+1999+pdf PDF link annotation
    • https://cdn.sqhk.co/giwumazusew/jw7DgfI/dizak.pdfIn PDF document text
    • http://tufilevazoropiz.iblogger.org/artigos_biocombustiveis.pdfIn PDF document text
    • https://kovorugoza.weebly.com/uploads/1/3/1/3/131383314/godulusefu.pdfIn PDF document text
    • https://wesemijotabiwa.weebly.com/uploads/1/3/4/6/134622043/gifirasinav-nigajet-judupupula.pdfIn PDF document text
    • http://blue-tick-central.com/7840319395rovim.pdfIn PDF document text
    • http://linza.media/power_of_a_praying_parent_bible_study0xrfq.pdfIn PDF document text
    • https://wonakusoxenim.weebly.com/uploads/1/3/5/3/135340368/lukutalimixud.pdfIn PDF document text
    • https://peruvapi.weebly.com/uploads/1/3/0/8/130813059/7314704.pdfIn PDF document text
    • https://cdn.sqhk.co/mudemodox/hfGhiTY/rosonovile.pdfIn PDF document text
    • https://cdn.sqhk.co/jeforije/Lxhh2T5/35609410798.pdfIn PDF document text
    • http://marketitaly.info/332689380931f7eb.pdfIn PDF document text
    • http://bugepugatoj.22web.org/skyrim_amorous_adventures_guide.pdfIn PDF document text
    • https://jasitonil.weebly.com/uploads/1/3/4/0/134096785/6ad5f8f78c75.pdfIn PDF document text
    • https://cdn.sqhk.co/riwajamugem/R3jImpf/11746609617.pdfIn PDF document text
    • https://dafizigupiteg.weebly.com/uploads/1/3/4/4/134492389/d5f27dd0c09.pdfIn PDF document text
    • http://rakuwotakiko.22web.org/free_piano_sheet_music_reflection_mulan.pdfIn PDF document text
    • http://finansi-7.online/lagu_hanya_rindu_tanpa_lirik2s69n.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/ca7cf699-a663-4573-b4cd-6c0308fe1321/miwepadixiviwitofagupimi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53890048-9579-4999-9ab7-1d4c43ce4bb4/82202091625.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbbb6e90-fcd7-42f0-ad06-4a475d75e559/best_pellets_for_harman_accentra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a013f223-59ca-401e-84d8-5b5468ebe636/bryant_plus_90_furnace_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf8b38e1-c025-4be4-82b1-f4322608da55/cutting_for_stone_abraham_verghese_summary.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_off0000ffc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC3 5716 bytes
SHA-256: f04db1fbb1c2c84b422ff310b894b224e9353645dee6d5e9dd789059c6f27629
font_01_sfnt_off00011332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11332 10264 bytes
SHA-256: b70d34438b327228f84e2b76149a006b6955deb50e88f568f201dbbe14f09811

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