Malicious PDF — malware analysis report

Static analysis result for SHA-256 47d1a40a9b4cc246…

MALICIOUS

PDF

91.5 KB Created: 2021-02-22 10:54:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 6e9b3ff272cb1b3ec18e52c2e1f5fa58 SHA-1: 61728b8358275f6f7003abd0d1ba0e5f272e6433 SHA-256: 47d1a40a9b4cc246d43be42be1f1181499c882eba13ee289d87026345bbdae4a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and employing UTM parameters, indicative of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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
  • 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=bollinger+bands+settings PDF link annotation
    • https://cdn.sqhk.co/wozepefiga/iahjwjh/gopiwubadijolizu.pdfIn PDF document text
    • https://cdn.sqhk.co/wusakituzu/XjhXhho/call_of_duty_for_ps4_price.pdfIn PDF document text
    • http://wajufogisabo.iblogger.org/free_christmas_wallpaper_for_android_phones.pdfIn PDF document text
    • http://rivuxini.66ghz.com/71930160445.pdfIn PDF document text
    • https://cdn.sqhk.co/xederebat/jbhgXxB/97830731302.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448540/normal_60133759548cf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454299/normal_5ff8da12f3356.pdfIn PDF document text
    • http://tifanikeza.22web.org/stinging_red_bumps_on_legs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414688/normal_6010f5cca9a86.pdfIn PDF document text
    • https://cdn.sqhk.co/jowapezo/BTieIvH/69910480619.pdfIn PDF document text
    • http://dasegirovitomen.22web.org/how_to_repair_bobbin_winder.pdfIn PDF document text
    • https://petabururumeje.weebly.com/uploads/1/3/4/9/134902787/vogex_zolorabefu_vuliki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://losoxapo.epizy.com/xivexuxox.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/mupituvow.pdfIn PDF document text
    • http://xekubot.epizy.com/cannot_resolve_symbol_nullable_android_studio.pdfIn PDF document text
    • http://kujujigufa.epizy.com/dreamweaver_cc_free_for_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/hennepin_county_diagnostic_assessment_form.pdfIn PDF document text
    • http://puzegekizizovin.epizy.com/46507518839.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromisixinolib/zojof.pdfIn PDF document text
    • http://segudufarus.epizy.com/17496551298.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_off000129b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129B6 5180 bytes
SHA-256: b33b7bbd6849c8838fc4b4a7d0dd13e4d70894412f68ed14af77f3c467a29447
font_01_sfnt_off00013b5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B5D 10996 bytes
SHA-256: e9bf98640b2b877d415336e4117480ea64f1fedbb75c2598a7915d7ee97b7276

Open this report in the interactive analyzer, or submit your own file for analysis.