Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3209037837e4198…

MALICIOUS

PDF

77.6 KB Created: 2021-03-12 03:38:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9a661733b47d4f52d9e2c6744b6bb1b2 SHA-1: 1e1d626dc1d5e2d76c7b869ee3b199c6f6981d79 SHA-256: d3209037837e4198920c9a7f155aa0766c8ec6a4cbee04d84ce21058d77f9322
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 0.9995

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://baarspo.ru/wix?keyword=jcpenney+jtime+employee+login PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4378171/normal_5ff656e818e09.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369502/normal_5ff2aecc842a7.pdfIn PDF document text
    • https://cdn.sqhk.co/devisofage/ybfjhii/knife_clash_apk_download_new_version.pdfIn PDF document text
    • https://cdn.sqhk.co/mamidusidozu/iPjcrb7/piano_games_free_music_piano_challenge_2020_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/mazavanov/0jfjcje/syberia_walkthrough_part_6.pdfIn PDF document text
    • https://cdn.sqhk.co/surodamiz/giOqie0/cod_fillet_recipes_easy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f32a7d3a-f801-429e-b91a-f952971558d8/freud_civilization_and_its_discontents_chapter_3.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/bink2w64._dll_64_bit_free.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/96003413488.pdfIn PDF document text
    • https://cc67bef4-e22e-42fd-bf01-3f02b15f800b.filesusr.com/ugd/080020_b779db0570894e17a8cd6de97be09d36.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/33043604-45d1-4429-bf44-85b8b2f8f38c/types_of_old_residential_wiring.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fd75d37-0bbd-455c-993c-1d418cdc4660/can_i_sue_for_emotional_distress_in_nz.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/nostarch_python_crash_course_cheat_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5707da2-d1e7-4421-a188-839df2a537e3/international_business_ki_definition_in_hindi.pdfIn PDF document text
    • https://36c7e617-1221-4173-b726-d5bce2878801.filesusr.com/ugd/610d21_2c464e019d894b1b8367888427bd0794.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ab12428-7d83-43ab-becc-ed9b45c6ae19/fimasivizakepafifa.pdfIn PDF document text
    • https://51bf459c-6b46-41b0-863f-532cf8a77e0d.filesusr.com/ugd/2eedf1_a52a37f05fa84401bc0ad421131cd5cc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/julaxel/dowenefalogodisigorokub.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/business_information_management_salary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9118dd82-ebe7-48bd-9c7a-fb85d7c5c998/what_is_apc_ups_green_mode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec0b08eb-4160-490c-a1f0-5a18ddf7aa36/76170591690.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26bcfaa8-4fe2-4cf4-bb70-e446c4f813f6/microsoft_powershell_3.0_free_download.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_off0000f2cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CB 4936 bytes
SHA-256: 6edf5ad1c834a0b766def78ec37594069823e8200242a831f54c3d52ce1e40bb
font_01_sfnt_off0001039e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039E 10900 bytes
SHA-256: 7f1473b4c86ff3228eb243e596ec7094a45815f4d9b625f786c9a82342341db7

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