Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c8218bd70d7142d…

MALICIOUS

PDF

97.3 KB Created: 2021-03-11 19:50:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 00a35b89fa285c0c2b988d7248e830f2 SHA-1: 3739b60279f65b2e0680f98e3f5840a0516b19f0 SHA-256: 0c8218bd70d7142d823eeaf1f6157f61c05efee01cbe7bba0daa0135b8c738a7
194 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. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://lozipotod.ru/wix?keyword=force+install+apk+adb PDF link annotation
    • https://cdn.sqhk.co/rifebonapesi/hcnpUhh/rukuba.pdfIn PDF document text
    • https://cdn.sqhk.co/kefexunas/ajfidgf/axonic_capital_performance.pdfIn PDF document text
    • https://cdn.sqhk.co/titesojijuko/eelwihx/pugoxabotadekul.pdfIn PDF document text
    • https://zabomefekezene.weebly.com/uploads/1/3/0/7/130740536/jopix.pdfIn PDF document text
    • https://nobakunifiximup.weebly.com/uploads/1/3/5/3/135310199/sumupesasoditezizo.pdfIn PDF document text
    • https://pabedowilopore.weebly.com/uploads/1/3/1/1/131163579/mumarubexinoz.pdfIn PDF document text
    • https://dotanivim.weebly.com/uploads/1/3/4/7/134705276/valifuzejiz.pdfIn PDF document text
    • https://xukifunizagopo.weebly.com/uploads/1/3/4/0/134013279/nejibopanofewewaduw.pdfIn PDF document text
    • https://tisolalaw.weebly.com/uploads/1/3/0/8/130814234/1517087.pdfIn PDF document text
    • https://jokinurelebuvet.weebly.com/uploads/1/3/1/8/131856462/sidemipuk.pdfIn PDF document text
    • https://vilejote.weebly.com/uploads/1/3/4/6/134629871/fajolulijerovo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gexovegamone.rf.gd/62201487304.pdfIn PDF document text
    • http://luzuviwuk.rf.gd/fizanigebarenafavepexog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/809c59ec-55d1-4297-9887-ec43b363ec4e/does_liam_die_in_the_darkest_minds_series.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec5c13fe-ac24-47f9-a0ce-d891726aa9fd/guess_how_much_i_love_you_fabric_bundle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08bf7e2e-aebf-4c35-9bdd-a5d7a83f2d97/79869925184.pdfIn PDF document text
    • http://runexodaluxova.epizy.com/xuduvumudidumewirixu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfad24ca-29e4-4f24-99f1-36d79f27ff02/how_to_replace_battery_in_garmin_heart_rate_monitor.pdfIn PDF document text
    • http://zalowakudedakov.rf.gd/2471009574.pdfIn PDF document text
    • http://kikumofesokir.rf.gd/52927179244.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_off00013df7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DF7 5224 bytes
SHA-256: 8a48cd29033715bebc536091854cebcc6b98271a8efc8ecbbd6826469324d4f1
font_01_sfnt_off00014fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FC8 12476 bytes
SHA-256: 137d1842e0a177b4a63937c968ef1bd2fa745dc0dee888c25d8b33f382701323