Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fb69f42c9473cff…

MALICIOUS

PDF

76.6 KB Created: 2021-05-13 00:40:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 869480a6928f9270ea226f24361aa116 SHA-1: 2cf2392dafce67be4926eab608189f1c70a50f78 SHA-256: 4fb69f42c9473cff40776684a251512f2add4e03f122e82354d32071979a6d35
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous external links, many pointing to disposable hosting, and one primary malicious URL disguised as a search result. The PDF structure and embedded content suggest it's part of a link farm designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/strik?utm_term=how+much+does+a+mechanic+get+paid+a+year PDF link annotation
    • http://onenature.space/dspic33fj32mc204_datasheetj0vga.pdfIn PDF document text
    • http://mevukavotidu.getenjoyment.net/telelajujesuderiw.pdfIn PDF document text
    • http://sizuxofutitarax.mypressonline.com/junubenoga.pdfIn PDF document text
    • http://paktum.pro/targus_bluetooth_speakerdbsmb.pdfIn PDF document text
    • http://all-casino.xyz/bluestack_windows_xp_sp3an01r.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/6fc0d05d-d154-403b-9323-a4721d4cd5ed/all_my_sons_summary_in_malayalam.pdfIn PDF document text
    • https://0fdd9f25-8366-4660-9463-376fd915ad39.filesusr.com/ugd/c16cf9_3545e8ab24af4964a67253d1b6f5a86e.pdf?index=trueIn PDF document text
    • https://9f349447-249b-4747-956a-316fe86e371b.filesusr.com/ugd/d2b720_c9242f9217d6413aacf2d39a078af405.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0232fe62-83f1-45b6-9a7f-385498fa53af/hunter_douglas_powerrise_battery_wand.pdfIn PDF document text
    • https://abaaaae4-9231-44fc-b12c-ad55ebcc68e7.filesusr.com/ugd/2ca09c_e9c66b2a840648c38c55ed84a293d5da.pdf?index=trueIn PDF document text
    • https://2c9641c8-5874-4869-9b94-f1378e60aa6b.filesusr.com/ugd/efc1f6_8fb2dd9706314180bdf75f96095c84cc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cc32ecf-3c23-4fe8-93a0-322bf1f7f4f2/logic_pro_x_manuals.pdfIn PDF document text
    • https://a1f0096d-76f5-425c-b826-5ccbd312c1bc.filesusr.com/ugd/8f8c07_669ba077b2144d22b30d0f18bf3dfb9d.pdf?index=trueIn PDF document text
    • https://562c2315-396f-49d1-9e45-1236e049cb13.filesusr.com/ugd/ec0012_cf5c4641275f477084e31c8a27af0810.pdf?index=trueIn PDF document text
    • https://7fad2989-91b8-457c-89bc-9a0e7aeef19f.filesusr.com/ugd/b03ff3_106b72051cfe4546b3ba32c50c92e738.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed298cac-4738-4e46-8fb7-d8ad55fe97d9/kuvajajel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b4657c9-dc3e-4c4f-a9c7-d6a29c1de149/columbus_blue_jackets_youth_hockey_camp.pdfIn PDF document text
    • http://fepetixapokurob.myartsonline.com/65092193096.pdfIn PDF document text
    • http://bitines.myartsonline.com/voxenajetagojetosodunab.pdfIn PDF document text
    • https://c09438b0-f1cf-4ade-afa2-d322e048c450.filesusr.com/ugd/313cc6_8706429dd0e9487293bea852e2189049.pdf?index=trueIn PDF document text
    • http://lejiletuvasipib.onlinewebshop.net/lobumowoxi.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_off0000ec16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC16 5608 bytes
SHA-256: b75b31d5ae0a705c50695c307a0387bcf58228e10801640998b50353972b224e
font_01_sfnt_off0000ff1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1C 11108 bytes
SHA-256: eddf72d253fbf5661592bbe9c2a0f97c33a2ec02c9bfb85ed698b3462c89ab68