Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0be69384a14aec2…

MALICIOUS

PDF

75.3 KB Created: 2021-02-23 01:13:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 97cf17530dc35e7a8a5e700bf8693b41 SHA-1: fcdbe37699582b513828d4884f9ac2dbb037b751 SHA-256: b0be69384a14aec2707db3c1ea02f22f3f24109a0eeb38ed6220bae7e594624d
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, a common tactic for link farms used in phishing or to distribute malware. Heuristics indicate a link farm on disposable hosting, and ClamAV detected it as a phishing trojan. The embedded URLs likely lead to malicious content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://seumenha.ru/strik?utm_term=the+brain+fog+fix+summary PDF link annotation
    • https://cdn.sqhk.co/pemoxeriko/jehi0ao/top_10_everything_2013_owasp.pdfIn PDF document text
    • https://cdn.sqhk.co/bubiwalifeda/zrRPhdh/neighbors_2014_script.pdfIn PDF document text
    • https://cdn.sqhk.co/tumexifukevu/hfT458l/destroyer_droid_rolling.pdfIn PDF document text
    • https://cdn.sqhk.co/badaxiloru/fbgdhe0/pexurulogubofepabo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470223/normal_6005260a389db.pdfIn PDF document text
    • https://nagiwavimev.weebly.com/uploads/1/3/4/6/134612684/menaxipupufuxoj.pdfIn PDF document text
    • https://lowonuve.weebly.com/uploads/1/3/4/5/134584544/4f5703e.pdfIn PDF document text
    • http://meine-gebuhrenfrei.com/spirit_halloween_hours_thursdayscwr7.pdfIn PDF document text
    • https://cdn.sqhk.co/xubuzivo/Kiikwjj/tidewarojaxugopakor.pdfIn PDF document text
    • http://rankingcoach-apps.com/dudivzex6e.pdfIn PDF document text
    • https://cdn.sqhk.co/nozedimasav/Qdjdhdq/pulukazubogur.pdfIn PDF document text
    • https://cdn.sqhk.co/zifeduwa/bhcWhaK/classic_movie_dvd_set.pdfIn PDF document text
    • https://cdn.sqhk.co/koxuzofu/wgghypo/japuzidatuvalilu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451227/normal_6017a941ac76b.pdfIn PDF document text
    • https://cdn.sqhk.co/linidivez/jdjc9Dw/bearded_butcher_youtube_deer.pdfIn PDF document text
    • https://solazipakiku.weebly.com/uploads/1/3/4/5/134509697/8277268.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366984/normal_5fd8c6b50a222.pdfIn PDF document text
    • http://shopwithsale.website/wisekatupevejeme87czf.pdfIn PDF document text
    • https://riwewupurudo.weebly.com/uploads/1/3/1/3/131381540/2927488.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gopifu/gaggia_brera_indicator_lights.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/iata_agent_code_format.pdfIn 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_off0000f32c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32C 5408 bytes
SHA-256: b6668336b3d866ff6795985ff6fee8e9c74d092394045257810de84b86790c5a
font_01_sfnt_off00010577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10577 10332 bytes
SHA-256: 5e749e9e93070789030d01ff4f3ff266cc05a0c77bb15b1be2eff558b70f64c2

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