Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0f5f2dac8831046…

MALICIOUS

PDF

81.6 KB Created: 2021-04-01 21:31:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4615061d756ed55f139df997ee7d13ba SHA-1: 5469e349ffb9cd52a7a51c072529c21d9555e18c SHA-256: f0f5f2dac8831046662723fe50379cd3d7be7e995d62a3b3856615e3e5b14512
156 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 0.9995

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://ponafet.ru/award?keyword=ccrn+review+pdf+free PDF link annotation
    • https://cdn.sqhk.co/lewoxiguj/dgjckjb/fulalexozumunin.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolefowi/GrZEBji/automower_connect_homekit.pdfIn PDF document text
    • https://cdn.sqhk.co/wadalibituge/cEggjic/kickstarter_mobile_games.pdfIn PDF document text
    • https://cdn.sqhk.co/xadowififux/1dE0ch8/73239688858.pdfIn PDF document text
    • https://cdn.sqhk.co/dudugetogi/gejhgev/42815019148.pdfIn PDF document text
    • https://cdn.sqhk.co/rijomawonuj/hzfTHhc/nira_ishq_mp3_ringtone_download_pagalworld._io.pdfIn PDF document text
    • https://cdn.sqhk.co/fupokiwil/jdibhhD/photo_studio_photo_editor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/divelatoxa/sapna_choudhary_song_video_dj.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/mujizolamas.pdfIn PDF document text
    • https://a6f18165-9bfd-46c9-8f51-0ab50cd0b687.filesusr.com/ugd/265c7a_2b9f24dd721b4128808b812fac25f28d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/whats_at_the_end_of_the_yellow_brick_road.pdfIn PDF document text
    • https://e24ff460-1725-4b9d-a7de-f8438c38fea0.filesusr.com/ugd/366850_8967aa5bdc584e89b1c138c9a57afe53.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zuxime/pinimopuwijovofipuwobonun.pdfIn PDF document text
    • https://d62ff7d9-aefc-4ab8-8cdf-af38868aea16.filesusr.com/ugd/54b9a1_c9dd27e807be477ebda6b2ba2a8c7114.pdf?index=trueIn PDF document text
    • https://235a1a37-2bc9-4d3b-8f1d-d3952ad9fba8.filesusr.com/ugd/3111f7_a65f684001184f4f82f2da9f303c5162.pdf?index=trueIn PDF document text
    • https://cae2aa39-5014-47ec-b549-0fed73f36d02.filesusr.com/ugd/c8683e_0b3d37c973f241038280e99ca5ea438f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/donarepemi/rejade.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/sbs_viceland_tv_guide_queensland.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/kajokozele.pdfIn PDF document text
    • https://8c330184-3457-40de-b162-e34763a77ed1.filesusr.com/ugd/0aae61_f7becd849ca54eea8e2d04fbfc9437a1.pdf?index=trueIn PDF document text
    • https://c370dac7-4848-4fa0-a6df-94361299e8ba.filesusr.com/ugd/fa6303_60366bd583fd40d699042040d8b5b532.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dorulusof/votejobup.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BA 4500 bytes
SHA-256: ba6ca8b2c4c38d01c07e15d3fb3dc62f3fe49889f7088cba0e6d81cd90f9de2f
font_01_sfnt_off0001041b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1041B 11328 bytes
SHA-256: f204149309783de2e85f5ec3423014f2f1505c755375f2df5be6ee1f99a128c7
font_02_sfnt_off00012a98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A98 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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