Malicious PDF — malware analysis report

Static analysis result for SHA-256 39ae9ff5400f0ec8…

MALICIOUS

PDF

75.3 KB Created: 2021-06-10 20:50:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a2d07a19744e8e2804eff14907c03258 SHA-1: 99aa07e3673ee3721136a00ec665df25b97709c0 SHA-256: 39ae9ff5400f0ec8218c8ee5433450589c18bd373887df5396d2820a7f51ba15
194 Risk Score

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 0.9991

Heuristics 7

  • 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.
  • 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://drafthe.ru/pbw?utm_term=download+blackmart+pro+apk PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4489061/normal_5fed4484bb058.pdfIn PDF document text
    • https://poraduke.weebly.com/uploads/1/3/4/3/134385775/d01f75bc313.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378410/normal_6049c60f1ddfb.pdfIn PDF document text
    • https://nulokoset.weebly.com/uploads/1/3/4/4/134447361/pujozenosojaze_lavomupisid.pdfIn PDF document text
    • https://narodejezagog.weebly.com/uploads/1/3/3/9/133988416/zodipuzewuzo_davuwonuful_toxoxufafog_zabikoji.pdfIn PDF document text
    • https://mibakadediwo.weebly.com/uploads/1/3/4/5/134584598/nekasijule.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480749/normal_602a0c9569c13.pdfIn PDF document text
    • https://fewaxozane.weebly.com/uploads/1/3/4/3/134341296/bebokojirapuzozijuni.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476768/normal_5febf934c7a90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420761/normal_60426eaeef829.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vomuseteweto.pbworks.com/f/what_is_the_fastest_method_to_solve_a_2x2_rubiks_cube.pdfIn PDF document text
    • http://zufumegi.pbworks.com/w/file/fetch/144791268/nugos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b37ab8a-17b1-4017-a003-b0fee9fe6da1/77960224174.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8106e80-eb35-4303-b823-3b5b88d6ae1b/65062900614.pdfIn PDF document text
    • http://nagomax.pbworks.com/w/file/fetch/144425670/bollywood_hd_mkv_avi_movie_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15c2d31f-afda-4bab-ad53-64a273d65d57/foroni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a623f96-5ee3-4fef-a83c-2e728696a26c/5704181603.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73e876a5-bcda-4378-b8d3-f47ec0832dad/42441496695.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63f1f4c6-ef26-41bb-88dc-7b450e698f8a/how_to_make_bose_soundbar_remote_universal.pdfIn PDF document text
    • http://razodegotit.pbworks.com/w/file/fetch/144803481/vance_walberg_2-2-1_press.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe17f855-8fc1-4e8e-846a-c9ba07488208/whirlpool_quiet_partner_1_specifications.pdfIn PDF document text
    • http://nidibewuzi.pbworks.com/f/xilexawolezajomud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc904f3e-0eec-4d6c-bd1e-4052b7461341/lirik_lagu_i_am_only_one_call_away.pdfIn PDF document text
    • http://kivupored.pbworks.com/f/affectation_minesec_aout_2020.pdfIn PDF document text
    • http://biwonuv.pbworks.com/f/50020955975.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_off0000e9a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A2 5336 bytes
SHA-256: 95f8d347ae04a9e9c510b8763c9f7a2098c53bcf14705b95a99c8528e8e8105c
font_01_sfnt_off0000fbc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC6 10632 bytes
SHA-256: eaf38606bbc4fe7dc9b89cb6333542f518e2426a00e3d0b944e783cb9810f648