Malicious PDF — malware analysis report

Static analysis result for SHA-256 d64f94a2f55ce15c…

MALICIOUS

PDF

77.2 KB Created: 2021-03-03 14:21:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3302ff94037331189b729941e820e6d0 SHA-1: 160bf6aa64dc0c40e774c1662348d895a97fe926 SHA-256: d64f94a2f55ce15ccdd402641bb17ae031971e62f55dc9606c969be45ab074b4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gimoguvi.ru/strik?utm_term=dark+souls+3+dex+faith+build+stats PDF link annotation
    • https://cdn.sqhk.co/lirebirab/iPifjij/49178174175.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476952/normal_5ff834a505016.pdfIn PDF document text
    • https://cdn.sqhk.co/kapipota/glhfzWF/89169676535.pdfIn PDF document text
    • http://omerkatanalp.com/93053144668btvo2.pdfIn PDF document text
    • https://cdn.sqhk.co/seworani/cgUIu7I/8d_music_player_pro_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404523/normal_5fded5fee8845.pdfIn PDF document text
    • https://cdn.sqhk.co/bekutojeke/xZhcijR/55122419910.pdfIn PDF document text
    • http://dsv-trening.ru/babuvaniwopatopinazevon0b99.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://rogidisili.rf.gd/98151787665.pdfIn PDF document text
    • http://kokalukavevip.epizy.com/93151148693.pdfIn PDF document text
    • http://pilulozames.epizy.com/crossfit_workout_routine_reddit.pdfIn PDF document text
    • http://vowaderisosalel.epizy.com/83837089512.pdfIn PDF document text
    • http://xofukadebinomo.epizy.com/16134448758.pdfIn PDF document text
    • http://wokobunowome.epizy.com/street_fighter_1_apk_android.pdfIn PDF document text
    • http://fedasumenusum.rf.gd/abecedario_japones_espaol.pdfIn PDF document text
    • http://ruwapebubori.epizy.com/persuasive_argument_against_school_uniforms.pdfIn PDF document text
    • http://nijesawojate.epizy.com/brixham_college_sixth_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DC 5204 bytes
SHA-256: f20144c459de0550120752a0159f1912053e295466267a05ea3ef553b35982e3
font_01_sfnt_off0000f4ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AC 11084 bytes
SHA-256: 736d6ed03d58b327608c5e99904c54dd0d3002d8fe9e2f1bab94aaefb4cb7dc7
font_02_sfnt_off0001194d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1194D 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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