Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e71b6627b6528bc…

MALICIOUS

PDF

118.7 KB Created: 2021-04-16 22:06:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a8055820e45695ccf4b12d617db46883 SHA-1: 2b4b2f78d9a9bdd9a2068eb9fede575b6cc5377b SHA-256: 6e71b6627b6528bc6292dc9166a7f94cabcf238b9c94dd59a40d7ef0f5da96e8
134 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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 https://fokemale.ru/strik?utm_term=the+fall+guy+episodes+wikipedia PDF link annotation
    • http://pasanubilop.iblogger.org/pizipaponezutezogisoda.pdfIn PDF document text
    • http://moscowflowers.online/gupedifaduqxpzv.pdfIn PDF document text
    • http://pornbustyvids.com/why_does_final_fantasy_7_remake_have_2_discs1we1m.pdfIn PDF document text
    • https://zaxixeresez.weebly.com/uploads/1/3/1/8/131871416/26cac8cd9e.pdfIn PDF document text
    • http://vodabutopidaru.getenjoyment.net/falanutozamavusibosevole.pdfIn PDF document text
    • https://viwijivawapel.weebly.com/uploads/1/3/4/4/134492302/9357976.pdfIn PDF document text
    • http://ital-tess.space/ligixebagar30bm.pdfIn PDF document text
    • http://doordash.link/2180967727z03am.pdfIn PDF document text
    • http://dujojiwasemob.mywebcommunity.org/37864854289.pdfIn PDF document text
    • http://wedevaz.sportsontheweb.net/87795849096.pdfIn PDF document text
    • https://mijutadozas.weebly.com/uploads/1/3/4/5/134590660/b79fae9074b104.pdfIn PDF document text
    • https://vifegozotamideb.weebly.com/uploads/1/3/4/2/134236473/0a673.pdfIn PDF document text
    • https://didegesub.weebly.com/uploads/1/3/2/6/132681352/gazelunaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nerepigov.rf.gd/accelerometer_deformation_monitoring.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/62797020686.pdfIn PDF document text
    • http://ropupifalapoges.atwebpages.com/wopemim.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/98364984748.pdfIn PDF document text
    • http://migukim.rf.gd/bakolemaw.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/philip_morris_pakistan_annual_report_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/91136295307.pdfIn PDF document text
    • http://daxijofasazavod.rf.gd/afghanistan_history.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/loss_of_accountable_forms_without_money_value.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_off0001950e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1950E 5412 bytes
SHA-256: e5468eec0aa95d8ec7eb41c3502dce88b1e1ca0ea9239eaf8cc3165c53eabd9f
font_01_sfnt_off0001a79a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A79A 11132 bytes
SHA-256: c136b2020c192032a0a5cfd394c4fd3e6f7952a4b1ece55875475a6a0c41bd14

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