Malicious PDF — malware analysis report

Static analysis result for SHA-256 f06050b8e107076a…

MALICIOUS

PDF

70.5 KB Created: 2021-02-07 10:34:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c063995d7a4d100dae21c4cabf16b491 SHA-1: c085a691a7c12361554f7d42eeee24ed757ee631 SHA-256: f06050b8e107076a27c7ab1e26d217535d12cb1b7e4fc49f58e53741825b14f9
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be a lure for free sheet music, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/aws?utm_term=fireflies+piano+sheet+music+free+pdf In PDF document text
    • http://interplast.ru/21797451570ucet8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417659/normal_60050c5faa9d2.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/ieoeggh/toca_kitchen_hair_salon_3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408348/normal_5ff90103bcd11.pdfIn PDF document text
    • https://cdn.sqhk.co/loxowopiv/icjhxhj/51400455121.pdfIn PDF document text
    • http://gukukoraxolu.iblogger.org/birth_plan_templates_uk.pdfIn PDF document text
    • http://vipadminler.org/30404339926d343y.pdfIn PDF document text
    • http://xitaboketeloba.iblogger.org/magirozofejokexagawa.pdfIn PDF document text
    • http://healthytrands.com/2016_chevy_camaro_rs_owners_manual2z7wg.pdfIn PDF document text
    • http://carbackseat.site/poultry_farm_biosecuritym86yp.pdfIn PDF document text
    • https://cdn.sqhk.co/xekejegixawo/jYhiUid/6939295826.pdfIn PDF document text
    • http://help-igcopyright.xyz/black_boy_hairstyles_for_short_hair1l6m7.pdfIn PDF document text
    • http://frukt.fun/movie_sites_using_bittorrentdsf7i.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377391/normal_5ff815de4740b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455375/normal_601f7ee9cb74a.pdfIn PDF document text
    • http://erogan24.website/18133861625iigi3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476601/normal_601a190d6e81d.pdfIn PDF document text
    • http://imkl-checker.com/31379002610qysxu.pdfIn PDF document text
    • http://jewlgems.com/crossy_road_unblocked_games_66111va.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403264/normal_5fe3b31b699f5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://subugemorikeg.rf.gd/nvidia_graphics_card_4gb_free.pdfIn PDF document text
    • http://nulupoz.epizy.com/72861466746.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_off0000d702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD702 5352 bytes
SHA-256: 546278f2f20643e3f8e9203e13894257ff0b1b60daa24e90d5085c0714c179da
font_01_sfnt_off0000e90d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90D 10344 bytes
SHA-256: 4daf14f9f6db8577e4ee3b05fd75df3a87bbe1ba9477c5fc964976bdfd9e5045

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