Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa9c0e22f943b81c…

MALICIOUS

PDF

96.4 KB Created: 2021-05-04 01:18:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: c9dfc1b7de414c4baf9633bb07b66a44 SHA-1: 22aa9122c91399fa1d53934517447ae144bad7e2 SHA-256: fa9c0e22f943b81ca1c913cba5dc43eb980c27c4e034ba2632999fd7c9600a0c
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The primary URL, https://jottigo.ru/strik?utm_term=how+to+read+music+for+xylophone, is likely part of this malicious infrastructure, aiming to redirect users to potentially harmful content.

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://jottigo.ru/strik?utm_term=how+to+read+music+for+xylophone PDF link annotation
    • https://ganaletikuwefe.weebly.com/uploads/1/3/4/3/134306697/2504206.pdfIn PDF document text
    • https://cdn.sqhk.co/rorezina/idsTAVe/menakezerirudok.pdfIn PDF document text
    • http://manidat.sportsontheweb.net/49549565967.pdfIn PDF document text
    • https://kiledakod.weebly.com/uploads/1/3/5/3/135385809/panosuluz.pdfIn PDF document text
    • https://cdn.sqhk.co/bamazaludez/duOhcif/puginusamu.pdfIn PDF document text
    • https://cdn.sqhk.co/kusamika/gXcigji/strongest_robot_in_real_steel.pdfIn PDF document text
    • https://lisiruzefixa.weebly.com/uploads/1/3/4/4/134495270/04f56713986235.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bujekotu.atwebpages.com/all_of_me_piano_guys_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/neoliberalismo_en_mexico_unam.pdfIn PDF document text
    • https://4a5bfc55-71df-4474-8f3e-9f6aca65c64b.filesusr.com/ugd/29b6ce_9bb885cab649468fa119ac517fe4ebf0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ab54dee-f919-48ce-91d2-0682aa2f0f72/biochemical_evidence_for_evolution_lab_23_answer_key.pdfIn PDF document text
    • https://9df6e0af-a028-4e88-91ba-61a1b37318d5.filesusr.com/ugd/7c1f05_73df03adc55d4676b49689dfe9304308.pdf?index=trueIn PDF document text
    • https://c809e8a6-5bdf-489d-8d8c-df4e4638a115.filesusr.com/ugd/45a296_f1466abac9d045d3870031e01bcc12f3.pdf?index=trueIn PDF document text
    • http://xakagigoneliv.myartsonline.com/limawabazuxudorugafabevel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c49bf682-1d4f-423c-b86c-4401edd26b51/is_india_vegetarian.pdfIn PDF document text
    • https://01d7ec8a-e38e-4e33-8c76-1be31754498b.filesusr.com/ugd/24d943_3a9cb1b011d546b79bdf9140823885e5.pdf?index=trueIn PDF document text
    • https://493f174a-a540-412c-bacb-e5b7b26cbfcf.filesusr.com/ugd/95bb70_ce903c08f9554ea0b907790d9fcb4a6e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c64b955-e09b-4478-b9c6-e09cab654270/78154094528.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f43eb77-7faf-4eee-9c92-4600aef69e66/dr_browns_sterilizer_microwave_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78e40917-28c2-47c2-a756-13f08732e556/vexerel.pdfIn PDF document text
    • http://zepuwiz.atwebpages.com/92499651718.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/persepolis_book_cover_analysis.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_off00013787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13787 5616 bytes
SHA-256: 505ab3a5327cf5c6138c2d24598956783e7261ce848a785dbcc16176eb9f6231
font_01_sfnt_off00014a8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A8E 12444 bytes
SHA-256: 76cb2eabb3f3f1185f70269045592317aa27094255b26ee4f7d4abe8eec34c99