Malicious PDF — malware analysis report

Static analysis result for SHA-256 96ea3e263773f32f…

MALICIOUS

PDF

83.4 KB Created: 2021-03-27 11:19:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e47a63fa69a1bcc9496b7b62d0b7a2d2 SHA-1: 59a15939f619ff08ec5ed5652d6aba5828185608 SHA-256: 96ea3e263773f32f64309a6dd08289512ab05bbaea8bd9df1ab749168a2263c1
186 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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://zajinet.ru/strik?utm_term=how+many+gods+are+mentioned+in+the+bible PDF link annotation
    • https://cdn.sqhk.co/botonerepap/7hi4WeH/video_downloader_plus_malware.pdfIn PDF document text
    • https://kowuzuworos.weebly.com/uploads/1/3/2/6/132682574/kotokeja.pdfIn PDF document text
    • https://cdn.sqhk.co/zidulibu/3jgibh6/51943052534.pdfIn PDF document text
    • https://valetakomo.weebly.com/uploads/1/3/4/0/134012509/2634278.pdfIn PDF document text
    • https://wafanipo.weebly.com/uploads/1/3/2/6/132695839/fetonizimerulifo.pdfIn PDF document text
    • https://cdn.sqhk.co/sogefuluf/Pjbtghn/management_abbreviation_dictionary.pdfIn PDF document text
    • https://cdn.sqhk.co/wimiwupo/xjejcgf/movie_maker_windows_free_best.pdfIn PDF document text
    • https://fovivijidilel.weebly.com/uploads/1/3/4/8/134888041/8412915.pdfIn PDF document text
    • https://cdn.sqhk.co/nufesewepi/hglDYPR/ifttt_alternatives_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/wubukuxivupe/ijaibjj/video_downloader_for_instagram_repost.pdfIn PDF document text
    • https://wujatukeki.weebly.com/uploads/1/3/1/8/131856991/dipugugukozoj.pdfIn PDF document text
    • https://cdn.sqhk.co/sawibevas/dUYpjjO/fanujitolawu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tapexiw/rojiwiso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55a83b2e-0e6b-4b85-bc56-7c81641e2332/lubuketunajivuwar.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/miwumaxitejorimizobudeb.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/22482531100.pdfIn PDF document text
    • https://367e539a-c541-4439-991c-4bf2bef2aa7a.filesusr.com/ugd/77d535_e88c689f48844b36892f50cf368a6e60.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5a2d5ba-4eec-4858-9e39-ea0b29f3e71d/had_a_dream_world_was_ending.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7a50a87-2322-48af-8bf9-1750d8b8d0ff/how_to_program_a_clicker_keypad_to_a_liftmaster_opener.pdfIn PDF document text
    • https://s3.amazonaws.com/futamo/shogun_2_total_war_three_kingdoms_mod.pdfIn PDF document text
    • https://cb8582fb-ab29-4f13-bfd4-623ca244ab52.filesusr.com/ugd/d61b30_289ad9b5429d40d380726b2aaca3babf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/wunisajejakel.pdfIn PDF document text
    • https://2c5a832e-93c4-4ab0-bef0-969ef348d747.filesusr.com/ugd/cc5daa_8d4f6405f1484f4f8dbd7e18614b9fd1.pdf?index=trueIn 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_off00010671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10671 5532 bytes
SHA-256: bae359bc45b5885a9d9731fb78cf7fab1e35dcc4c5df84dc51d49f98bc22ee7f
font_01_sfnt_off00011923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11923 11368 bytes
SHA-256: a8656a6d55da2db09896ea9ef06bfc5c95e48ddc4cf3d28cd3db4e4bcdf4b8bf