Malicious PDF — malware analysis report

Static analysis result for SHA-256 d60cc950876d3b75…

MALICIOUS

PDF

74.5 KB Created: 2021-06-07 12:56:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: d4d8bdc36401d87a3f8889bad1f5b7c4 SHA-1: 67fb35edc9a3ad605df319d9b9a5c0129c4e46cf SHA-256: d60cc950876d3b75776fc8d4da384ee12bee3ae792d04dda513b38be88c0d29d
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, indicating a link farm or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to lure users to malicious content.

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://krisoc.ru/pbw?utm_term=singham+geri+d%25C3%25B6n%25C3%25BCyor+t%25C3%25BCrk%25C3%25A7e+dublaj+izle PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414498/normal_60248c3472567.pdfIn PDF document text
    • https://kefavevanafas.weebly.com/uploads/1/3/4/6/134633526/wexugerokubu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483839/normal_6047893e11c90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388815/normal_604b43b601b64.pdfIn PDF document text
    • https://depoferi.weebly.com/uploads/1/3/4/4/134445349/gaveleweje.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/74283213-39da-4384-9f0a-b31d3886486b/how_do_you_locate_the_main_idea_and_its_supporting_details.pdfIn PDF document text
    • http://sipibujewadu.pbworks.com/f/gizenosefuxagebigipid.pdfIn PDF document text
    • http://medodadepud.pbworks.com/w/file/fetch/144770028/how_to_remove_glacier_bay_bathroom_faucet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23f39ad2-5127-48c7-9bd9-da280f67a5b3/this_is_water_david_foster_wallace.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f678511c-33d2-404d-a16a-9da263e16db3/zilaguzafebinulenurosaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67c480d7-865e-454b-add2-0b8103c2c0a6/porowuvazowexewin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03c7341d-66d9-4eac-a345-ca989915ab3d/how_to_pray_the_holy_rosary_step_by_step.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10558e76-d8e8-4beb-a89b-b75d8055cc18/craftsman_self_propelled_lawn_mower_not_starting.pdfIn PDF document text
    • http://nuxawakaxaz.pbworks.com/f/how_to_transfer_large_files_from_pc_to_pc_reddit.pdfIn PDF document text
    • http://nagomax.pbworks.com/w/file/fetch/144667059/razor_prank_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ba1ef3c-e3ed-495b-9081-f7a4e24a78ab/1260946490.pdfIn PDF document text
    • http://minuwaxiper.pbworks.com/w/file/fetch/144521607/bololukubewod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4169ba49-8e07-458e-9523-ebbfa75d536d/panasonic_omnimovie_vhs_battery.pdfIn PDF document text
    • http://tubekikewabi.pbworks.com/f/1773150487.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_off0000e13d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE13D 6036 bytes
SHA-256: 41b83220aa6b6b4d1650cad92618c413994b33f7599d3ca2997f2f963973312e
font_01_sfnt_off0000f534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF534 11436 bytes
SHA-256: 8ba9a5dd6f49e2c51041d42588e918911140aa7fd1c7a49c4cf39fef2a9582b4