Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe6b8aec20c0c187…

MALICIOUS

PDF

79.0 KB Created: 2021-04-09 07:51:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2165bddcac38145ac4423565a82f88dc SHA-1: 9f44edd330bff7e83e3e177f975fc048f35e1873 SHA-256: fe6b8aec20c0c1879ec112bb2dd2605976c7ec93e598fd01f6bdb5b42ee4464a
156 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. 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-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.
  • 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://zajinet.ru/strik?utm_term=panasonic+kx-dt343+how+to+check+voicemail PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4449600/normal_5ff67016ce32c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501214/normal_5fc5a645accf9.pdfIn PDF document text
    • https://cdn.sqhk.co/ludozenidi/ybjhggf/draw_a_stickman_epic_2_nintendo_switch_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417309/normal_600669dee7fc2.pdfIn PDF document text
    • https://cdn.sqhk.co/ravuviwidi/giJwuig/super_8_plus_nes_emulator_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/mosepoxik/3Dgeig7/gopi_doll_fashion_salon_2_game_download_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457318/normal_5fdfb6beb3e5c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455898/normal_5fdf5d3888b21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390999/normal_60204359d456e.pdfIn PDF document text
    • https://cdn.sqhk.co/lamiwifa/Yzmifwa/samurai_vs_zombie_defence_2_mod_apk_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454559/normal_603e6d80cd9b0.pdfIn PDF document text
    • https://cdn.sqhk.co/buxifuludo/hbhjigK/18620900370.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450350/normal_6063948e264ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470543/normal_603ebdce79d0d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393508/normal_5fccf1cf753fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448110/normal_60060fb842705.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b760d8db-9746-4821-aa2b-94c9f806d328.filesusr.com/ugd/26ce45_e9f31adb8d424983a38107c061c7601a.pdf?index=trueIn PDF document text
    • https://caf0f927-206f-4b4e-aa34-0dd3da53679b.filesusr.com/ugd/83d902_c2a6a8b90e0c418f9cc88e67469bc92b.pdf?index=trueIn PDF document text
    • https://a0e9597c-cfbb-4fc1-b0e0-47ed6411b148.filesusr.com/ugd/24269e_136038b9bd564b0cb046f47a430a501a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b97f1226-a9b5-456c-80b6-91ac8273460a/navedodowujiwafodabit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc25d9f3-1da5-441c-89a1-314d704f6231/you_never_eat_alone_ep_1_dailymotion.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_off0000f539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF539 5652 bytes
SHA-256: a3d5ece9ea81f59984f8e476b4a6797392dbe2e96b5130014d35be692d07c85c
font_01_sfnt_off0001087a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087A 11080 bytes
SHA-256: 30d5803f9de1b32bd14a8c74bd9a6e46c462fefb4694c05b38b053b9f98fccc6

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