Malicious PDF — malware analysis report

Static analysis result for SHA-256 765ab71bb0b463ed…

MALICIOUS

PDF

73.3 KB Created: 2021-03-22 05:44:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af295dcaf96ad951254406e00eb2f5a4 SHA-1: d3c6ff235eab8ac81f0ad7ee9e4ba8ac79ad1976 SHA-256: 765ab71bb0b463ed67d24eeb794bd88b0a28a825f16d03c5557c750b7c4d7568
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a lure for an advance-fee scam, as indicated by the 'SE_ADVANCE_FEE_SCAM_LURE' heuristic. It also contains a large number of external links, many of which point to potentially malicious or unknown URLs, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://zajinet.ru/award?keyword=mukhyamantri+awas+yojana+gramin+up+form+pdf
    • https://zokexeti.weebly.com/uploads/1/3/5/9/135966989/gepezifajamebim-gigakox.pdf
    • https://warodimaziwini.weebly.com/uploads/1/3/4/6/134611971/4213696.pdf
    • https://zisamezasebav.weebly.com/uploads/1/3/3/9/133997726/gipidepolewedatu.pdf
    • http://tubezadobuzaro.66ghz.com/68653228100.pdf
    • https://gurufikenifa.weebly.com/uploads/1/3/2/3/132303388/jadisolavowu.pdf
    • https://cdn.sqhk.co/kukelagalefe/xujfhiU/76740589396.pdf
    • https://cdn.sqhk.co/gawagunikuw/QoDzjgN/luvajobuvu.pdf
    • https://cdn.sqhk.co/zapimafe/jzhgEig/archery_target_bag_dunham_s.pdf
    • https://xuboxale.weebly.com/uploads/1/3/1/4/131452808/9288076.pdf
    • https://cdn.sqhk.co/muribirigim/HrjcNhf/estas_tomando_meaning.pdf
    • https://midunaso.weebly.com/uploads/1/3/4/6/134680252/fuguvur_kobazifil_dukusanugoj_bezonaduluz.pdf
    • https://malavaxun.weebly.com/uploads/1/3/4/0/134018228/152332.pdf
    • https://lobovalosidim.weebly.com/uploads/1/3/1/4/131437181/gatomulaguzugejul.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://weferobiditikun.epizy.com/are_burpees_good_for_burning_fat.pdf
    • https://s3.amazonaws.com/kumasala/diabetes_guidelines_2018_ppt.pdf
    • http://dipulitexaxuz.epizy.com/como_aprender_ingles_descargar.pdf
    • https://s3.amazonaws.com/lebejos/bad_boy_hd_wallpapers_apk.pdf
    • https://s3.amazonaws.com/vifusupegiza/contrarian_trading.pdf
    • http://nesitobika.rf.gd/77239295210.pdf
    • http://tokejavopif.rf.gd/business_trip_report.pdf
    • https://s3.amazonaws.com/kiremefegonar/56590823999.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dee5.bin
02e9569dec7637afd747388494abb380b8e52c2e9c05e2784cfb10f826a0c2be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE5 5760 bytes
font_01_sfnt_off0000f284.bin
b1bb4424a13b560643ce23d4e91739d172c96caa4b7c095a765c3fe3d49a8c6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF284 10856 bytes

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