Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b3fa5f6df56fab1…

MALICIOUS

PDF

72.8 KB Created: 2021-03-27 18:33:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 84e37bdb41424f9b06c2593909d51a92 SHA-1: e3e2ed5d8908d7d999f49ce83a0a35ba5d7ac7f8 SHA-256: 5b3fa5f6df56fab17869263c2b04fae9e3d3513956d586bd5d01867d51593bec
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The presence of a 'Minecraft forge' lure in the document body and URL parameters indicates a phishing or malware distribution attempt. While no scripts were directly extracted, the PDF structure and heuristic firings strongly suggest malicious intent, likely involving redirection to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://dugedepap.ru/123?utm_term=minecraft+forge+1.+14+2 PDF link annotation
    • https://xotozefubineru.weebly.com/uploads/1/3/4/5/134576546/terepuk-pakusarugi-wubiditeza.pdfIn PDF document text
    • https://golizagizaziw.weebly.com/uploads/1/3/4/7/134701046/takufovi.pdfIn PDF document text
    • https://widonudafedezu.weebly.com/uploads/1/3/0/7/130776490/5386733.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449184/normal_60542229a27f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366397/normal_5fdf6dabc6b9a.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/a50cac85-edb2-410f-a203-cf884abd6081/which_diet_app_is_the_best.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/234bf46e-1ccc-481f-955b-5a8ca4881b91/nojipetozapu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cfe09f9-6e7b-4d09-bf3f-804590db9f29/60272103832.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26520c72-2ba0-4b09-b859-68a736545e27/87955735491.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cff8a0f6-ab9f-49e1-8391-13617d6f9085/56190525285.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3aafaeb6-bcde-44a2-b622-a85f2a7c3d47/calima_planet_of_the_apes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b57be02f-2fbd-43d7-bb56-4521a4d14567/how_to_draw_grandma_from_georges_marvellous_medicine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bed6692e-ad8c-405e-a549-2607ccd6924a/does_costco_take_insurance_for_hearing_aids.pdfIn PDF document text
    • https://ff536187-e25a-4bd2-965b-ff1113cf40b0.filesusr.com/ugd/bfcccc_88206d4e3cc84a91b1877780dca4a935.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fd006af-507c-4c59-80d1-a9bcf2049d24/hp_deskjet_2541_cartridge_installation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/587d5e92-d04e-4988-88c1-20101de66b41/wine_enthusiast_wine_refrigerator_repair.pdfIn PDF document text
    • https://14319df0-7947-4f0d-bbb3-eaa17d5eb23e.filesusr.com/ugd/c45f38_5a6812daccfe483d9ca0669ddbd27df9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff249f26-6e8b-4207-aad8-34168d92026d/ge_adora_refrigerator_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9888cdd6-fb97-4724-b184-a2f418ef75a8/22826861175.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_off0000df38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF38 5148 bytes
SHA-256: 2dd841239e1fc6e6ed970a8ab1388ce4f855e5843cf419ba15942031fb1613db
font_01_sfnt_off0000f0f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F2 10516 bytes
SHA-256: 04ef555556ae6660d8ecbfb2c1ef9adb322c7d9294d5098e61f7c17b6db2de0b