Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c5a1ae12de21586…

MALICIOUS

PDF

75.2 KB Created: 2021-06-06 03:42:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c1c408cd146216a01f35eefff0a2aa98 SHA-1: de2788b3b2ba6d63c853da5f1cefd941df70ce0d SHA-256: 3c5a1ae12de215868a6bb4f3e3dcdbb9f7059f2fbd1245b1ac6ded20f6e18dc4
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pixomot.ru/pbw?utm_term=the+gameplay+of+tekken+3+free+download+pc+game PDF link annotation
    • https://depoferi.weebly.com/uploads/1/3/4/4/134445349/ae812a91f.pdfIn PDF document text
    • https://vugadeji.weebly.com/uploads/1/3/1/4/131406436/c809007e50cf9.pdfIn PDF document text
    • https://ladulokepalixu.weebly.com/uploads/1/3/4/8/134878898/2965657.pdfIn PDF document text
    • https://guvemixekowarov.weebly.com/uploads/1/3/4/6/134686109/0985476e151f.pdfIn PDF document text
    • https://rafopotoze.weebly.com/uploads/1/3/4/6/134609035/diviromux-jotip.pdfIn PDF document text
    • https://xadatazibinul.weebly.com/uploads/1/3/1/4/131483053/965eac5fa5e.pdfIn PDF document text
    • https://muberelikaxisax.weebly.com/uploads/1/3/1/1/131163953/07e3086d5fd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://visetululiv.pbworks.com/f/duxupatunuraw.pdfIn PDF document text
    • http://mibegenav.pbworks.com/w/file/fetch/144441591/54258958607.pdfIn PDF document text
    • http://joxakuruvi.pbworks.com/f/54395724353.pdfIn PDF document text
    • http://najapenoz.pbworks.com/w/file/fetch/144550647/believer_korean_movie_full_eng_sub.pdfIn PDF document text
    • http://goferupemo.pbworks.com/w/file/fetch/144678345/what_is_the_primary_conflict_of_lord_of_the_flies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44e852bd-affb-4d62-bee4-0e01943e7375/chinese_tik_tok_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9444f42-93ed-41f6-b111-4fe6719624ff/92050185770.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d66caa9c-866d-4dae-8874-a4915aa71e8e/magic_mouse_battery_life_draining_rapidly.pdfIn PDF document text
    • http://jajisaparev.pbworks.com/f/kuta_software_congruence_postulates_answers.pdfIn PDF document text
    • http://dawijunegolo.pbworks.com/w/file/fetch/144576783/danepalasugaluninag.pdfIn PDF document text
    • http://bupataved.pbworks.com/f/strona_bierna_angielski_wszystkie_czasy.pdfIn PDF document text
    • http://kelivesas.pbworks.com/f/downloadable_atomic_habits_worksheets.pdfIn PDF document text
    • http://genarozep.pbworks.com/f/90894940180.pdfIn PDF document text
    • http://zopujoxobug.pbworks.com/w/file/fetch/144411426/buwurezomenidelolafulawis.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_off0000e64b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE64B 5764 bytes
SHA-256: 7dfff7bcb3abb0b788facb749e7edad604892ccc6aa89cbc01e7430e02a0458e
font_01_sfnt_off0000f9e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E6 10912 bytes
SHA-256: 66547ffb0d48a38eb56b080ebf08e0dc32b35788baf018f77d36435ab6676129

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