Malicious PDF — malware analysis report

Static analysis result for SHA-256 972f9e1c39e73c40…

MALICIOUS

PDF

86.1 KB Created: 2021-05-14 21:54:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ac1aa2b62092c6a7f0d2371b8369cb5a SHA-1: b279d096a2d060820c91dad4273fa934f6271898 SHA-256: 972f9e1c39e73c4062a540056f12f8ae632d124b851f8a71ac00d02486a33948
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 0.9996

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://xezojetit.ru/strik?utm_term=how+to+take+authorised+service+centre PDF link annotation
    • http://fullpisetc.ru/the_bludgeon_brothers_theme_songln7nh.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/jihheoV/new_york_city_hall_guided_tours.pdfIn PDF document text
    • https://cdn.sqhk.co/tefulobesa/jfAgirp/86032179442.pdfIn PDF document text
    • http://sochi2026.com/larizatutibenejelapidilamnq1me.pdfIn PDF document text
    • https://cdn.sqhk.co/fimegasaz/hghawji/kuseve.pdfIn PDF document text
    • http://starconflict-game.ru/tanuvexebupob1wojr.pdfIn PDF document text
    • http://sfhgfje5df.xyz/remote_working_information_technology_jobszpyyo.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
    • https://s3.amazonaws.com/vetamedisoz/pebugitomotu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c867acbd-c9c9-470d-a902-2fa3ff6a1d5e/q-see_ip_camera_setup.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/windows_dialog_box_template.pdfIn PDF document text
    • http://jewixijanag.rf.gd/40166335631.pdfIn PDF document text
    • http://wipojijize.rf.gd/56609194854.pdfIn PDF document text
    • http://taborodadux.rf.gd/chapter_7_geometry_test.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/37140395267.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e45cce3a-4ed9-4e85-a933-364f2372ee02/nilabedufifatozit.pdfIn PDF document text
    • http://timasunodu.rf.gd/tomb_of_annihilation_full.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/mevetamadukuledowe.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/zipevap.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE75 5056 bytes
SHA-256: b796fb1777e17173fa1f91caf4559f0b2005cd534875b68ff838bdfb6870fd07
font_01_sfnt_off0000ffaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAF 11428 bytes
SHA-256: 038a9aa9f0eefdd391cf666d3817b5207f68214e9949d9234df68fe51d94d8fb
font_02_sfnt_off000126db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126DB 16232 bytes
SHA-256: 6188fded39fd8156db8a33c0d4eb5b0e0112b2b7505c1495b6ab875f831d6e39
font_03_sfnt_off00013c3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C3E 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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