Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d04afd32406c2fe…

MALICIOUS

PDF

89.1 KB Created: 2021-06-01 06:39:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 30286ef505b583a9adc7f3724d83a7a0 SHA-1: 50e9d80f03c262a44d3ecd4eaa99f66f8c61afc7 SHA-256: 2d04afd32406c2fe40bb0b5d08d1a99e78316876ab68bee55dee643614fbc565
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of techniques used to redirect users to malicious sites.

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://queure.ru/pbw?utm_term=how+to+cook+stuffed+chicken+breast+wrapped+in+bacon PDF link annotation
    • https://wudatoguji.weebly.com/uploads/1/3/4/8/134885495/9102893.pdfIn PDF document text
    • https://zapirawega.weebly.com/uploads/1/3/0/9/130969804/c71d26e53130d71.pdfIn PDF document text
    • https://bujezabuzi.weebly.com/uploads/1/3/4/3/134310034/zolobosoluvapov.pdfIn PDF document text
    • https://dobuxavebixeli.weebly.com/uploads/1/3/4/7/134725246/vumojanasotigo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428043/normal_6025bb4ae9ddc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382189/normal_600c45b93dccc.pdfIn PDF document text
    • https://rabofabi.weebly.com/uploads/1/3/0/8/130813834/dokezavufud-palevoza-zuvilirugoxo-gunozubixalu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501029/normal_5fd6795904571.pdfIn PDF document text
    • https://xurarasetar.weebly.com/uploads/1/3/4/0/134096945/8813206.pdfIn PDF document text
    • https://ragurinibobuma.weebly.com/uploads/1/3/3/9/133986244/gilikofusi.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/377d651f-86cc-46b5-9a95-57dbab08bf6e/a_song_of_ice_and_fire_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56e1bfbc-a4c4-4e7e-93f4-ddeee25ccbbe/dominos_near_me_now_delivery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/055486ce-95e1-4d6f-adc3-04cd1120bd3b/epson_wf_3540_sublimation_ink.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a91c6544-4eb8-46b1-9486-52aa04b15e24/give_3_examples_of_corporate_social_responsibility_in_the_uae.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/350216ca-5099-43fb-b76b-6fa1aca8deef/fujuwagoxedo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fe1c47d-36e5-4c03-bfd5-3a9ac87c6e09/vuranonutefe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13a70ff3-ab76-4aa6-8c67-b5a5ef3fe3b3/kingdom_management_osrs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/685e4a9d-0e58-4650-aa48-dc7f9ec2fbc8/waterpik_remove_tonsil_stones.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3c17688-d6ec-4d41-a5c7-cb41925878f4/foguxarimozidat.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_off00011c39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C39 5468 bytes
SHA-256: 0ec1e3cf74ad384f880d7504e8ffb06c7cb2e21ff475d81ddb053f2823cf38f4
font_01_sfnt_off00012ed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED7 11676 bytes
SHA-256: 713d58c6601bfcbdff3225ed6f0171d26d968cf510c62fc8408591c4226dc3b5