Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b4d6713d43443a6…

MALICIOUS

PDF

94.4 KB Created: 2021-06-26 03:21:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: efb8b550f8d844a87156a6bddf645a41 SHA-1: 5f9f6322eec8f640abf7c8f90703e31fb191eb4e SHA-256: 8b4d6713d43443a63db8bc791e6c6921529dfd3e5e97fd14abae444287a889e0
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, exhibiting characteristics of an advance-fee scam lure. The document contains multiple links to potentially compromised WordPress sites and disposable hosting, suggesting it is part of a link farm designed to distribute malicious content. While no scripts were explicitly extracted, the PDF structure and link farm behavior indicate a phishing or scam attempt, likely delivered via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 8

  • 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.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://bogelaipigeon.com/upload/file/lokepivelexuv.pdf
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/7p6lgejvltjq1o016k3v0btnui/23319307882.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607730caa6d99---2693735965.pdf
    • http://koreaseals.com/ckfinder/userfiles/files/zirivonakafexupama.pdf
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/f3dc135d63692129981658af6616157b/nilapenaketeboji.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/32834063e2621fe77feb772bd187067a/lafekexepena.pdf
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607632d7255df---raxipezofilul.pdf
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607077864c637---zawezipikex.pdf
    • https://directorvincentchow.com/fck_filemanager_upload/file/xuwariluxifipuvize.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a588d1435---xipanuvaj.pdf
    • http://mashtalkandil.com/userfiles/file/wazibafuxudijobigolaxas.pdf
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/6uccuj97of80bngk0r2v1lspjs/voruvalovuximisuxavula.pdf
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160859a9406f42---zatoxamenerasufijud.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdcf3cf9fd---xibuxezokezelifinozaj.pdf
    • https://yenhuy.vn/upload/files/92560327172.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c68843c1655---75557846103.pdf
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/97bb5f4e12548011a8651cc079330488/wosesekav.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087c4bc6f2b1---zutogojabobob.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16091554556029---jarobena.pdf
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/3b892fdfd189a1f844176248a99d2879/41648607367.pdf
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/5ccdsl8tpkovhoap0jb5jof6pl/33832374562.pdf
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af768e2c666---69579598660.pdf
    • https://dimensioninteractive.com/WYSIWYGImage/file/79041255397.pdf
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160902ec4e96e8---bujigus.pdf
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072894b45049---mixibozumokunibixudukadin.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=today+football+match+spain
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010dcb.bin
0e22af37a7294b675c4a0cdfb564fd33b19a7e8dc86d3153e4db6b4cc63094d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCB 17480 bytes
font_01_sfnt_off00013b97.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13B97 16792 bytes
font_02_sfnt_off000153ae.bin
b35475de5ef2d0d80aad40f351b9cf8854d64f4ab842ea0e11a1faa74c48020c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x153AE 10872 bytes

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