Malicious PDF — malware analysis report

Static analysis result for SHA-256 3baaa1ff85ce5ae4…

MALICIOUS

PDF

86.0 KB Created: 2021-04-05 03:04:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 0e6205527c991cf38f9e60ec21cceb43 SHA-1: eb965f6a813f3247b7b4f0aa79dfa34767a5f2fc SHA-256: 3baaa1ff85ce5ae4d11fc94650137d23e26384d93109d11b2f3d77bd1f18a6f0
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains, which is characteristic of SEO spam or phishing campaigns. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://nipisod.ru/award?keyword=disturbios+adrenais+pdf PDF link annotation
    • https://cdn.sqhk.co/pubabolab/J5ngegg/77592960483.pdfIn PDF document text
    • https://cdn.sqhk.co/zinoliwomi/4ihMjiD/spiderman_vs_venom_comic_book.pdfIn PDF document text
    • https://figagukedeliv.weebly.com/uploads/1/3/4/0/134040575/8e169f645662ebb.pdfIn PDF document text
    • https://nometoxuf.weebly.com/uploads/1/3/4/2/134266561/77ce942ac255e0c.pdfIn PDF document text
    • https://xinozujo.weebly.com/uploads/1/3/0/8/130874257/3ba2d163698.pdfIn PDF document text
    • https://mopebewugo.weebly.com/uploads/1/3/0/7/130776026/2814104.pdfIn PDF document text
    • https://pebawozo.weebly.com/uploads/1/3/4/8/134865175/sawagekapifeleg.pdfIn PDF document text
    • https://nixozetite.weebly.com/uploads/1/3/0/8/130873825/7685730.pdfIn PDF document text
    • https://feronokemafa.weebly.com/uploads/1/3/1/1/131164109/rojusobudufun.pdfIn PDF document text
    • https://cdn.sqhk.co/talokelom/cyvifjF/shadow_skater_mod_apk.pdfIn PDF document text
    • https://gopilabuvimira.weebly.com/uploads/1/3/1/4/131453416/2d590cee7e152f2.pdfIn PDF document text
    • https://cdn.sqhk.co/vibebexez/idIgekq/spirit_airlines_check_in_boarding_pass.pdfIn PDF document text
    • https://bomoturu.weebly.com/uploads/1/3/1/3/131384468/7299764.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/dc95172e-7c39-46dc-be0d-b05bc0a717e9/jarikivevukosewamewibudej.pdfIn PDF document text
    • https://070488ba-e3d9-4c74-834b-445551f5513c.filesusr.com/ugd/fb83f1_9c909306014d478e99a1e43fb74e3c6f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/watajive/vmware_workstation_10_with_serial_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ad8798f-d4f2-42da-add3-d6a09a2f479d/zubulurolumadat.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/97954101283.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5790f670-c1cd-4f02-8845-8d8d309d2238/why_does_my_portable_air_conditioner_leak_water.pdfIn PDF document text
    • https://95043331-d9de-4498-ad98-35b8ac3ee23f.filesusr.com/ugd/5740b2_fb92bb871e85419e902b9d8af2956e2a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dfa6af3-62ce-4fc6-b991-431bcd54bdc1/90434688869.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BB 5024 bytes
SHA-256: 83bd944ae705b8c43ecc83fc354eb46e1eb0158509bca0a96c1d38bba8f4e281
font_01_sfnt_off000113d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D1 13220 bytes
SHA-256: 76f0dba1ee0a960a8659c2570baf49fa2fe90ef187b9f6c823fcbc4711230960
font_02_sfnt_off00013b92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B92 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3