Malicious PDF — malware analysis report

Static analysis result for SHA-256 40bbdd60b24485ff…

MALICIOUS

PDF

84.6 KB Created: 2021-03-15 11:40:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7c7d1418bfa3340b577d4eea4d2af59c SHA-1: b055032cd4674be6480e70a8627838c366c0fec8 SHA-256: 40bbdd60b24485fffb38e9a7cae8d99858960c95068fc2ece6f09b4ade491d46
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://lozipotod.ru/wix?keyword=graco+nautilus+elite+car+seat+instructions PDF link annotation
    • https://risenezapaf.weebly.com/uploads/1/3/4/4/134481661/409bc39f.pdfIn PDF document text
    • https://xaxexuwolak.weebly.com/uploads/1/3/5/9/135978614/zalekiwuzex.pdfIn PDF document text
    • https://cdn.sqhk.co/kajipazuto/gDXReia/dsi_2019_papier.pdfIn PDF document text
    • https://kurakozizuvev.weebly.com/uploads/1/3/2/6/132681999/bakuzipepovugub.pdfIn PDF document text
    • https://cdn.sqhk.co/simikimira/hd9gfhb/pocket_troops_strategy_rpg_mod_apk.pdfIn PDF document text
    • https://zoradelageruwol.weebly.com/uploads/1/3/4/5/134591251/gigubojuxira.pdfIn PDF document text
    • https://cdn.sqhk.co/nebafaveju/cOUsvgf/dark_skeleton_skull_wallpaper.pdfIn PDF document text
    • https://luxefelukij.weebly.com/uploads/1/3/0/7/130775337/xiwaxematarujitoza.pdfIn PDF document text
    • https://cdn.sqhk.co/zaviresodew/shjihpa/fubevufifi.pdfIn PDF document text
    • https://jotukodapoze.weebly.com/uploads/1/3/4/6/134632246/mofegeve.pdfIn PDF document text
    • https://rugovisatef.weebly.com/uploads/1/3/2/6/132682701/1a500a0a11e0.pdfIn PDF document text
    • https://balixilime.weebly.com/uploads/1/3/1/3/131398392/pekogusasedizenab.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/dinisemowoge/automotive_lighting_design.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/4_pics_1_word_level_216_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/30053435636.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48963ec7-25b1-4a79-828f-d9bbbed3ffdc/jiminibew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/372f5f8e-846f-4baf-948a-1cc1cfe3aaf7/robaniwomaragavu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0961ef6e-eaa8-422f-beb0-5fe563787c5b/does_costco_sell_hearing_aids_in_canada.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_off000100a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A4 4708 bytes
SHA-256: 5bd72cc8bb3bee171a3fcfd57a982615af1546bc8e48c9a7495a530e34d96fb0
font_01_sfnt_off000110a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A9 11128 bytes
SHA-256: bc0f6eb02f1b6f94fac787d719014ff1adb62f11e63f4ef4b46223844a2fe05a
font_02_sfnt_off00013682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13682 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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