Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab76cf14854e4de9…

MALICIOUS

PDF

119.1 KB Created: 2021-03-21 03:30:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: e417de21b3e21025859ccfe53a204af6 SHA-1: dfafd4762da6bfb6b1dd1776e78aa7d851e1bacd SHA-256: ab76cf14854e4de9913aa69016d9c23c8688aaab014669ee418231a5f2b29d91
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a large number of external links, identified as a link farm, with a primary URL pointing to a suspicious domain. This suggests the document is designed to redirect users to potentially malicious websites, likely for phishing or malware distribution. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=fallout+3+survival+guide+perks PDF link annotation
    • https://cdn.sqhk.co/wanevakaxuma/DPjfDVy/bee_gees_best_songs_videos.pdfIn PDF document text
    • https://cdn.sqhk.co/kupulifip/aid6fii/phone_electric_live_wallpaper_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/lilakeboj/iaPQ6hh/bemupenajufuzu.pdfIn PDF document text
    • https://cdn.sqhk.co/pubamegumox/UrCShiZ/78757144978.pdfIn PDF document text
    • https://cdn.sqhk.co/lipebefaje/gOiihcK/lomonudotika.pdfIn PDF document text
    • https://cdn.sqhk.co/vimitewimuwi/Ghf9ljj/soccer_world_cup_trophy_clip_art.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/eig8oig/kakusekena.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/485d6f23-8434-4eb8-9449-4d983757ce07/alaska_airlines_safety_dance_video.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/bagrut_module_e_2015_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/9500864451.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/77459957283.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a85f748c-bd91-4f4e-8ba8-245ca93e1b7a/fovosajaluwivod.pdfIn PDF document text
    • https://0a01f052-6ee6-4bfa-868d-d2e49373b03f.filesusr.com/ugd/55f640_a01fad9ec1df4716959065a169280c37.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea011409-61a0-482b-a11c-a22023be6463/sanunatekigopab.pdfIn PDF document text
    • http://xewepipesu.epizy.com/10733314988.pdfIn PDF document text
    • https://d21da297-2d1c-4020-882f-059d99c29dc9.filesusr.com/ugd/3724a2_792f1b2f72c34b358601084a5fdfc14d.pdf?index=trueIn PDF document text
    • http://tosuniwenalob.epizy.com/itil_v3_foundation_certification_training.pdfIn PDF document text
    • http://somukagokololu.rf.gd/nufojedumul.pdfIn PDF document text
    • https://b23183eb-b2e5-455e-bc25-91fac1efd10f.filesusr.com/ugd/cc14e4_854fe9be962547b5a0d18517bc386727.pdf?index=trueIn PDF document text
    • http://gesinevilagavu.rf.gd/makkar_ielts_speaking_topics_2020.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_off00019556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19556 5372 bytes
SHA-256: f9cbb31a9b1e77bad6137738a2b2102f03bf1922bd0a97ffb3dd5542a4e5f279
font_01_sfnt_off0001a7b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A7B7 11748 bytes
SHA-256: 8764613170395c7664e21294718d1832c144e089f4d5fbbf1bcc55666b65f3d7

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