Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a1662edaa105294…

MALICIOUS

PDF

71.9 KB Created: 2020-12-01 15:44:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 9c18718c196c819641b352055395b8b3 SHA-1: dbbc819c416d39f47f5c1e248226ad45113dcec6 SHA-256: 9a1662edaa1052947fd7ae83d341a0d1536d048fea477c4eee88c45bc0740333
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The presence of a large number of external links, including one pointing to 'trafffi.ru', suggests a link farm or phishing attempt. Although no scripts were explicitly extracted, the PDF structure and heuristics indicate it's designed to host and distribute malicious content, likely through the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://trafffi.ru/123?utm_term=mission+impossible+4+online+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365612/normal_5fc2ccc4afa64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369904/normal_5f8bd98d750f5.pdfIn PDF document text
    • https://nuzibekupin.weebly.com/uploads/1/3/4/3/134338080/e789baef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374860/normal_5fa5d32fcb289.pdfIn PDF document text
    • https://kulojimafad.weebly.com/uploads/1/3/4/5/134518235/5821990.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374537/normal_5f99603b0fd69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414869/normal_5fb4e9daea816.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/edb590df-382b-4fb5-8777-df2e79448c20/40655878300.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84f0ce7b-3cfc-4048-84ca-bd077494c26e/wiredumurazaduropixaviwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3673242f-ac01-4e29-8d68-59464917cf67/harry_potter_and_the_half_blood_prince_full_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb9de774-69b5-48ea-8178-10f85043f4cf/scorch_trials_book_cover.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3d92baa-f083-4e5b-b08d-87c61e2ddadb/90471568518.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d33427a199023ab4f616/t/5fc3173808845d0924ef76d0/1606620987984/57231961491.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7468296-5132-4690-89c6-107332365ccb/names_of_all_american_girl_dolls.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_off0000cef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF3 4776 bytes
SHA-256: fe494aa1e87327d2f3b8e6592d490e6d0e8e466d053c96d915d5dd787b01137c
font_01_sfnt_off0000df06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF06 10848 bytes
SHA-256: e932fe4d42ebcb7c2c84a6a32485faf51c8f16a7142c71495634a20e4db2639c
font_02_sfnt_off00010447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10447 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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