Malicious PDF — malware analysis report

Static analysis result for SHA-256 86a2d81c60d7cd50…

MALICIOUS

PDF

83.4 KB Created: 2021-03-24 09:26:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c478064f1b228b36d936f56252464954 SHA-1: 9fffbf258bb9ecf1c7efe6eaf6fe45a207330e26 SHA-256: 86a2d81c60d7cd506069d7207c8b80920fdcf2cded5606fe41c07a2c04b2c8a8
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, characteristic of a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=pacific+nw+tree+octopus+natural+predators PDF link annotation
    • https://raguloduw.weebly.com/uploads/1/3/4/0/134041620/3bbf26.pdfIn PDF document text
    • https://vuderuxedus.weebly.com/uploads/1/3/4/6/134692959/kezowagifivuke.pdfIn PDF document text
    • https://cdn.sqhk.co/tinipuded/s8Whhfd/pandora_14k_gold_heart_ring.pdfIn PDF document text
    • https://jawuwokobot.weebly.com/uploads/1/3/1/3/131381435/7f079c1f6dc9.pdfIn PDF document text
    • https://wovupidej.weebly.com/uploads/1/3/4/6/134687137/zogife.pdfIn PDF document text
    • https://gitarufimoka.weebly.com/uploads/1/3/4/2/134235546/0241de46b195660.pdfIn PDF document text
    • https://cdn.sqhk.co/jefokejab/aiTjdjg/40223638883.pdfIn PDF document text
    • https://cdn.sqhk.co/logulemuset/z9geCWM/diverse_meaning_in_english.pdfIn PDF document text
    • https://betewobinolatid.weebly.com/uploads/1/3/4/7/134756009/dced593d70.pdfIn PDF document text
    • https://cdn.sqhk.co/satijumok/FfjeGji/snow_bros_nes_ebay.pdfIn PDF document text
    • https://mewibanomerazam.weebly.com/uploads/1/3/5/3/135348120/jonuxare-vopagirawejuge-nifanek-kibijosisalun.pdfIn PDF document text
    • http://xoxugexoxafuwet.iblogger.org/how_to_reduce_file_size_using_acrobat_xi_pro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366367/normal_6023fa7cbe8a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449783/normal_5fe80bf7bc68d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414175/normal_6028b9e8d04c6.pdfIn PDF document text
    • https://sukanoxe.weebly.com/uploads/1/3/1/4/131453950/pubav.pdfIn PDF document text
    • https://wewowalowumuv.weebly.com/uploads/1/3/4/0/134040384/vikuvituwenogofano.pdfIn PDF document text
    • http://zapatopi.net/treeoctopus/TheIn 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://uploads.strikinglycdn.com/files/7ee75c25-a055-402d-b17c-7aac91e0bb27/kenmore_gas_stove_burner_grates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efdf2ef2-172c-4b7e-a853-0bfc8023d941/craftsman_gt6000_mower_deck_parts.pdfIn PDF document text
    • http://zaxutakizet.epizy.com/bard_guide_pathfinder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e99ec72a-4d28-4fb0-b2f1-27560ce097c6/devupozezoresis.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_off0000fc2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2C 5124 bytes
SHA-256: 24a6befc7635b9006d4ac7cd4a7d22f239ea533629d31820ac81adedb45bdb9e
font_01_sfnt_off00010da9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA9 10464 bytes
SHA-256: 0ec90081a6a0848165a8bd64663412db71458bb488d1a9e1a46f54a122b77392
font_02_sfnt_off00013152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13152 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361