Malicious PDF — malware analysis report

Static analysis result for SHA-256 68f201230a6c952e…

MALICIOUS

PDF

67.0 KB Created: 2021-04-19 15:55:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4ea2c942c5cc33c2dd1b691844ec410c SHA-1: 2fe126f989d489bf55ddf4a0e15ce8dd59604c2f SHA-256: 68f201230a6c952e58773967ca1b61184894615668d6e73dd7d1c70cc1869516
186 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 0.9998

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://crophysi.ru/strik?utm_term=lpg+gas+pipeline+installation+services+near+me PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4418583/normal_6043e25f9c8fd.pdfIn PDF document text
    • https://jezexubuxerib.weebly.com/uploads/1/3/4/0/134040893/vujizesewede.pdfIn PDF document text
    • https://bizitodavil.weebly.com/uploads/1/3/4/3/134321392/luxapulamax-peganolop-dexale.pdfIn PDF document text
    • https://xanuvewetarew.weebly.com/uploads/1/3/4/7/134732967/061f77fbf56529b.pdfIn PDF document text
    • https://mumamelif.weebly.com/uploads/1/3/4/4/134464597/f91bfd220.pdfIn PDF document text
    • https://lenapejasuma.weebly.com/uploads/1/3/4/7/134749539/3f1af4b56.pdfIn PDF document text
    • http://lovechat24.club/what_are_the_characteristics_of_coconut9bm5r.pdfIn PDF document text
    • https://nebuxegakox.weebly.com/uploads/1/3/4/4/134404726/7eae57.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376598/normal_5ff580d4dbe09.pdfIn PDF document text
    • https://kepegefamoza.weebly.com/uploads/1/3/1/3/131398453/3717285.pdfIn PDF document text
    • https://batebabegusuk.weebly.com/uploads/1/3/1/4/131437625/bafenaneje_fuxedomexaji_widozobatinapiw_poroxo.pdfIn PDF document text
    • http://dezlice.ru/nier_automata_sacrifice_save_datarvxyj.pdfIn PDF document text
    • https://rutelixiriselop.weebly.com/uploads/1/3/4/7/134748314/3334602.pdfIn PDF document text
    • http://alisaborodaenko.design/color_cars_games_monster_truck_coloring_sheetsn9ayr.pdfIn PDF document text
    • http://rgtuitp.ru/baby_milestones_chart_12-24_monthsalbo6.pdfIn PDF document text
    • http://alphabitx.com/sanazazivesesoq903f.pdfIn PDF document text
    • https://gajevorotaro.weebly.com/uploads/1/3/5/3/135329880/dde1f.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/3aad3b95-6637-45e9-8fb3-0763f84d1125/90517318582.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6359da91-d494-4620-b836-e12c63c8f978/sennheiser_ew_100_g4-me2_835-s_1g8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62e03266-7c20-4c0c-a567-3f70e01b67bc/the_certified_six_sigma_green_belt_handbook_second_edition_e-book.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_off0000c81f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC81F 5252 bytes
SHA-256: 37b0f74069ebd3d95eaf9cee073e9d64ee29acfd592f249017d5f9f660efd6ae
font_01_sfnt_off0000d9fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FB 10884 bytes
SHA-256: 5f90870176d5c382c945d3de0f366cc63f672bb796298a8c6603fea4019f10c8

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