Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fcbd578476aebbd…

MALICIOUS

PDF

83.9 KB Created: 2021-04-04 11:42:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e397f6c1da4247a1ea3675f0786a1584 SHA-1: 057a81e4fc491b2270b2fe58cf1c15f521229ad6 SHA-256: 8fcbd578476aebbdcbbec119f3d6e48da7aa95c51e958cac30ec1fb379dfd033
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, a common tactic for phishing or scam operations. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests the document's content is designed to trick users into parting with money, likely by promising a prize or facilitating a fake delivery. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/strik?utm_term=panel+solar+casero+maqueta
    • http://vatidenow.medianewsonline.com/bifezumororegesilizevedel.pdf
    • https://kukitame.weebly.com/uploads/1/3/1/3/131379641/2892e34f.pdf
    • http://postel-na-zakaz.ru/gozeguloleziteliduxupuub4.pdf
    • https://cdn-cms.f-static.net/uploads/4418984/normal_60450712ca533.pdf
    • https://luxovifawus.weebly.com/uploads/1/3/4/3/134341193/kojibirozu.pdf
    • http://abzac.me/xilufefaxufine5lbmw.pdf
    • http://tabikola.online/55564531317mjfow.pdf
    • https://cdn-cms.f-static.net/uploads/4454043/normal_602d53272f2d4.pdf
    • https://cdn-cms.f-static.net/uploads/4371010/normal_601764ce32947.pdf
    • https://nujetamewude.weebly.com/uploads/1/3/4/8/134881912/kudimajubafu.pdf
    • http://detozube.scienceontheweb.net/logic_problems_x2_home_improvements.pdf
    • https://cdn-cms.f-static.net/uploads/4471250/normal_601b36b803c9c.pdf
    • http://national-verifyteam.com/vurobeloz1it2o.pdf
    • http://zavolofa.mygamesonline.org/9325290954.pdf
    • http://nurigoluda.mygamesonline.org/last_6_month_current_affairs_in_english.pdf
    • https://cdn-cms.f-static.net/uploads/4378410/normal_602d04916de4b.pdf
    • http://ygrash.website/xumafukitoguzopunvcwd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://misanedajog.myartsonline.com/malayala_manorama_news_paper_today_pathanamthitta_edition.pdf
    • http://rexefobixavater.myartsonline.com/matlab_programming_fundamentals.pdf
    • http://nopugorib.onlinewebshop.net/japis.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_off000108fe.bin
827932c7b72dbb97857fec0c67c48b4eaa5de1f381c5594e2e60dcb694476c16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108FE 5072 bytes
font_01_sfnt_off00011a2a.bin
320468a4505781feb371a77b5c6d8fad5bd7aaf2ed16947823798ff34d2c97cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A2A 12200 bytes

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