Malicious PDF — malware analysis report

Static analysis result for SHA-256 facfc9fc8b6e592d…

MALICIOUS

PDF

65.9 KB Created: 2021-02-15 13:21:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 943bffc779a083d4b5cf5049c7669831 SHA-1: b13a327d9f8d540f5144feb6afe2b398a9ececa1 SHA-256: facfc9fc8b6e592d765a41703fed9de1ed6086c23b57305ba0a85c022930d6e3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous external links, with a critical heuristic identifying a link farm pointing to 'http://yourdesk.website/xojupirajofemewobapogenaf6yzqs.pdf'. This suggests the document is designed to redirect users to malicious sites for malware distribution. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2528dad23a95d95-10044376-0', further indicating malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://druttle.ru/wb?keyword=how%20do%20you%20calculate%20prevailing%20wage PDF link annotation
    • http://yourdesk.website/xojupirajofemewobapogenaf6yzqs.pdfIn PDF document text
    • http://uspehdnyaaxyz.xyz/world_hardest_game_download_freeuz78l.pdfIn PDF document text
    • http://boldly-grow.com/3ds_max_camera_pathoprdy.pdfIn PDF document text
    • http://supportcopyright.net/69612445194w0ocy.pdfIn PDF document text
    • http://scm03.ru/gawazuvvi168.pdfIn PDF document text
    • https://junerokiwoji.weebly.com/uploads/1/3/0/7/130775834/fcf2e.pdfIn PDF document text
    • http://naturwow.space/kenworth_w900l_shift_patternonh5d.pdfIn PDF document text
    • https://dufofumiwiz.weebly.com/uploads/1/3/5/3/135309849/13b5eab.pdfIn PDF document text
    • http://save50.pro/microbial_assay_of_antibioticsb2jj6.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/jupevuxirapi/basel_ii_framework.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/zaputununogoxapazonovodi.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/consolidated_balance_sheet_of_nestle_2017-_18.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/92225113765.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/no_baking_sheet_substitute.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/850380803.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/d_d_character_backstory_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/calendar_ortodox_noiembrie_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/fifuto/budots_dance_video.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_off0000c66f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC66F 5280 bytes
SHA-256: 17116e7ef4fe6e8bf9c3d8bd0f77a4002155cf70ff386d5094da9b7213052c05
font_01_sfnt_off0000d892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD892 10000 bytes
SHA-256: ba502e72fa64b13e12ead04a08166eb071f0888d43d4bb7d3f1db607e2daad7b

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