Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4124dabfec494bc…

MALICIOUS

PDF

74.6 KB Created: 2021-03-07 01:20:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6ba99c32020d895a79ae43783de290d6 SHA-1: 6267e10f77a0ad81e47a4d371759f8da6f749040 SHA-256: d4124dabfec494bc3996dfe1ed179fa388602b5681e34b10155ba01ae777cf23
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file exhibits characteristics of a link farm, containing numerous external links to other PDF documents, many hosted on disposable domains. The primary URL suggests a lure for users searching for repair manuals, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly support its malicious nature.

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://ponafet.ru/wix?keyword=2001+chevy+malibu+repair+manual+free+download PDF link annotation
    • https://cdn.sqhk.co/jupujezaxa/5ihbtcI/bovezuwawuvipozuwazeda.pdfIn PDF document text
    • https://nagugopusoz.weebly.com/uploads/1/3/4/6/134645600/2858041.pdfIn PDF document text
    • http://xasedogamif.mypressonline.com/how_to_merge_files_in_foxit_phantompdf.pdfIn PDF document text
    • https://babexunerasosib.weebly.com/uploads/1/3/4/6/134620176/671086.pdfIn PDF document text
    • http://farozemirig.scienceontheweb.net/rafokevarasal.pdfIn PDF document text
    • https://zedodunojoponex.weebly.com/uploads/1/3/6/0/136083391/53777.pdfIn PDF document text
    • https://cdn.sqhk.co/sirepajaku/hGistnk/pottery_barn_baby_cribs_and_dressers.pdfIn PDF document text
    • https://guduzuzej.weebly.com/uploads/1/3/1/6/131606672/gikusekitabeligat.pdfIn PDF document text
    • https://cdn.sqhk.co/vasozaponem/idiejiE/wall_art_sculptures_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/viwedanej/kqieUji/one-_punch_man_road_to_hero_2._0.pdfIn PDF document text
    • https://cdn.sqhk.co/miwizawi/jjhjcnC/the_battle_cats_uber_super_rare_tier_list.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolaseja/gjjohgu/werewolf_bar_mitzvah_donald_glover.pdfIn PDF document text
    • https://xukafubisek.weebly.com/uploads/1/3/4/2/134265855/nodarol-ninosaf-selodofako.pdfIn PDF document text
    • https://terulupi.weebly.com/uploads/1/3/1/4/131406892/mamuxegavexukaxa.pdfIn PDF document text
    • https://cdn.sqhk.co/veleviziwew/pmgeifB/maze_runner_unity_3d.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/4062e45d-9c8b-426c-841d-b17bf75e1979/60603023397.pdfIn PDF document text
    • http://jabejanaboz.atwebpages.com/putufisotusasolejiwenino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/455e459b-fb87-4254-980f-d642a35ac929/starcraft_boats_for_sale_maine.pdfIn PDF document text
    • http://gozidonozali.myartsonline.com/where_to_send_bushnell_scopes_for_repair.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_off0000e58a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE58A 5840 bytes
SHA-256: ca11d05f0926e563cff54d485b542dc8a94edfe862186ca23f30d9e257845a56
font_01_sfnt_off0000f95e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95E 10408 bytes
SHA-256: ea3fafd0f59371edb9aa1ae5cc35dab6e4503267b2c3d7ba887a070386ac17fa