Malicious PDF — malware analysis report

Static analysis result for SHA-256 184b4245dbb1f2e8…

MALICIOUS

PDF

79.6 KB Created: 2021-04-05 17:07:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 6c2aa78954b47adfef5cef8c1d13ff40 SHA-1: 0e3a4074c2dd507b2006a8d6d8a37e8e3a3fafcb SHA-256: 184b4245dbb1f2e87c76cabafe99eb303a9a8931e7882908f82a30a6e5f2536e
126 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 phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable hosting or suspicious domains, designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, suggests a lure related to printable maps, likely a pretext to drive traffic to these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://kuzutuzo.ru/award?keyword=map+of+continents+and+oceans+printable+pdf PDF link annotation
    • https://cdn.sqhk.co/rotonoba/ihjjeif/11363616862.pdfIn PDF document text
    • https://cdn.sqhk.co/medijamowole/aVmkuvp/74263624244.pdfIn PDF document text
    • http://riniwodifole.medianewsonline.com/lawn_genie_lawn_dial_instructions.pdfIn PDF document text
    • https://cdn.sqhk.co/piravasufinu/ehbJIig/91801707174.pdfIn PDF document text
    • http://davupopebuwiser.sportsontheweb.net/53498479800.pdfIn PDF document text
    • http://bivitajuteje.mypressonline.com/dykes_to_watch_out_for_book.pdfIn PDF document text
    • http://xuzerujagojagip.scienceontheweb.net/27939517949.pdfIn PDF document text
    • http://zabemaladameg.medianewsonline.com/karyotype_worksheet.pdfIn PDF document text
    • http://bikejesoxatelo.mygamesonline.org/87679867264.pdfIn PDF document text
    • https://cdn.sqhk.co/gitogozune/a73FnU6/70990069187.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0fe83ef2-ed6b-4f04-a52d-31fe3c58d8d1.filesusr.com/ugd/ade4e6_94aa75a7333744fba04b21b3084bbe5b.pdf?index=trueIn PDF document text
    • https://2a6c20f5-091f-48b5-a5be-bf749919b1f6.filesusr.com/ugd/3794ad_90c3e939d83f48bb99be9d2b2f69abf5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/035c4898-21bd-4793-a18c-ba0710ba85f7/fibibakujojit.pdfIn PDF document text
    • http://zijedan.atwebpages.com/49341216050.pdfIn PDF document text
    • https://cc46d2ba-e7cf-42f8-aa62-b015a0c17ef0.filesusr.com/ugd/d180c3_563ae52967f1408a8d13aba7d1b64823.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/62f181ca-a107-463e-bc90-7868164977bf/99820683512.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_off0000f7ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7EA 5292 bytes
SHA-256: 55262f6ef76baadd6a50804dabb9c68b95e7ba875fd087c79a5d3348e9eb5259
font_01_sfnt_off00010a00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A00 11532 bytes
SHA-256: a2c509828c01c5a529c21eaebbaba45c96c1001b22ab325d94f2c4fd2389f86d

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