Malicious PDF — malware analysis report

Static analysis result for SHA-256 3102ec4828eaa751…

MALICIOUS

PDF

120.1 KB Created: 2021-04-03 00:54:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 84f72792f210699be02d5a02a6069b04 SHA-1: c499aa2cbac3c8dfb243deb8ca9bcf895cb3b72f SHA-256: 3102ec4828eaa751cb173013dbf14519f1c1a29e6a2ce7dc1bbebebcd693012e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier with high confidence. It contains numerous external URIs, including one pointing to 'golowaki.ru', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm on disposable hosting, further supporting malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • 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://golowaki.ru/strik?utm_term=lexus+gx+460+tow+prep+package PDF link annotation
    • https://cdn.sqhk.co/lemisobe/eKNgjVR/patch_for_smart_launcher_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411917/normal_604d0f833911f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415077/normal_6026bd76e49a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417220/normal_601b9bad64397.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480585/normal_6032a3d55485c.pdfIn PDF document text
    • http://mavasovakixof.iblogger.org/vw_passat_dsg_transmission_fluid_change.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366989/normal_601ac77c0db21.pdfIn PDF document text
    • http://nevodoma.iblogger.org/lawoje.pdfIn PDF document text
    • https://cdn.sqhk.co/lojosexotak/dOkjb5G/lepew.pdfIn PDF document text
    • http://gigogon.22web.org/age_of_empires_1_gameplay_1997.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403687/normal_6008d46d85372.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://donamofarapim.rf.gd/natinesizigoparutow.pdfIn PDF document text
    • http://jidabalelibixu.rf.gd/statistics_in_psychology_course_online.pdfIn PDF document text
    • http://balubusepebibi.rf.gd/rudowosu.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/15041761782.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/19275051168.pdfIn PDF document text
    • http://xulivef.rf.gd/geraxadifemo.pdfIn PDF document text
    • http://tizerusop.rf.gd/ews_10_reservation_form.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_off00019843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19843 5620 bytes
SHA-256: 7e117ccd6d8a7955b4abe65166cc4bc8694e233b2e35dcb95bb35adbc48f3ed1
font_01_sfnt_off0001ab9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB9F 11540 bytes
SHA-256: 94b94747e715a0b1977908512155764d108dec3362c1545afd901f6104d9c8eb

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