Malicious PDF — malware analysis report

Static analysis result for SHA-256 96119fd8c279e4e6…

MALICIOUS

PDF

83.6 KB Created: 2021-04-16 08:05:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7bf1ca478ae1407412922314e20eb66c SHA-1: d8dc13eb88f8a4582fc24aa066ef487104a28ce3 SHA-256: 96119fd8c279e4e612be261d690eade6d646183002e9d543d1d17587e4141522
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/strik?utm_term=nikon+n8008s+manual+pdf PDF link annotation
    • https://geligafut.weebly.com/uploads/1/3/4/0/134012400/47485671cee27.pdfIn PDF document text
    • https://fisulujat.weebly.com/uploads/1/3/1/4/131454297/5462021.pdfIn PDF document text
    • https://nawobelif.weebly.com/uploads/1/3/5/3/135307193/b57c767bc86b.pdfIn PDF document text
    • https://riveveketudoj.weebly.com/uploads/1/3/4/7/134706505/razobaxezedokajonuva.pdfIn PDF document text
    • https://gefetejumifigo.weebly.com/uploads/1/3/4/6/134688955/vodigefabok-libudaguweluto-sogirobabalad-vomokelof.pdfIn PDF document text
    • https://lepitedow.weebly.com/uploads/1/3/4/8/134885181/volosis.pdfIn PDF document text
    • https://suwagapijewes.weebly.com/uploads/1/3/2/6/132682436/9200158.pdfIn PDF document text
    • https://mawakigimewu.weebly.com/uploads/1/3/4/8/134875352/6609856.pdfIn PDF document text
    • https://kironipopobak.weebly.com/uploads/1/3/4/3/134308812/nugozeru_vetirugekanu_fudowaju.pdfIn PDF document text
    • https://midonoguta.weebly.com/uploads/1/3/5/3/135347847/7279933.pdfIn PDF document text
    • https://fagedanagaga.weebly.com/uploads/1/3/4/8/134876409/ba1d4e2d7d7a93.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/roware/zagesuzopugevajus.pdfIn PDF document text
    • http://japefafe.epizy.com/filegeretoxuwi.pdfIn PDF document text
    • https://af1bea64-f5cd-41c2-a7c1-97f21c1aa057.filesusr.com/ugd/592671_c5c0b4735b4a4729aed876b77512d7f4.pdf?index=trueIn PDF document text
    • http://gudekor.rf.gd/jazajemofu.pdfIn PDF document text
    • https://b23ebcb4-2e41-4c68-a408-584c84124782.filesusr.com/ugd/5a2446_07fb32ab01824e82a327575a76797bfb.pdf?index=trueIn PDF document text
    • https://aab3b5a3-3501-4647-bf8d-17d8175ff737.filesusr.com/ugd/87b9a8_cf4883b47bbf4ca6aa386d4022737acb.pdf?index=trueIn PDF document text
    • http://gigitepusiligo.epizy.com/48562111183.pdfIn PDF document text
    • http://kagowuv.epizy.com/janode.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/lagu_percaya_aku_versi_dj.pdfIn PDF document text
    • https://f8ba888e-8f71-4fde-8303-550399648f4e.filesusr.com/ugd/17ce20_9aa23913d9ea4fb28d7dd37c1733c0e6.pdf?index=trueIn 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_off000108be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108BE 5460 bytes
SHA-256: b3e177f85bbfc82d74578ef99b7875062974c304c54553c35cc9c49d67ee4896
font_01_sfnt_off00011b48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B48 11196 bytes
SHA-256: b3aefb07f20b39f403dc17aa8959dea21bff7e95646e82802bdbe5905f5d05e7

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