Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b9214794ccf9c22…

MALICIOUS

PDF

90.1 KB Created: 2021-05-27 01:41:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 46947b4fcd050399395f6ccc80cdd9ae SHA-1: c5ad4c61cea6ec9fdb8fd99c3668914c5470cf85 SHA-256: 6b9214794ccf9c227176146013ef47a3631cf505876411a751468500849bcf70
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, including a redirector URL, suggesting it's part of a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a game modding search query, directing users to potentially malicious sites.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://ponafet.ru/strik?utm_term=skyrim+how+to+add+outfit+to+bodyslide PDF link annotation
    • https://napajudiweji.weebly.com/uploads/1/3/4/3/134316113/4994252.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417669/normal_602b55abf103b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385422/normal_606a8eb8d8596.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419623/normal_600e8f0a1c3e9.pdfIn PDF document text
    • https://gesogakit.weebly.com/uploads/1/3/4/5/134581759/336eb429e94ec02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408866/normal_601dd7aa671f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368955/normal_606779a3d552f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464313/normal_5fe6de360eda7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482188/normal_5ff8b8f61a8c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453889/normal_60268df2154e7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475397/normal_5ff467abae5ca.pdfIn PDF document text
    • https://zomasaxejis.weebly.com/uploads/1/3/4/3/134325580/romem.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464080/normal_5ffd68ef4e336.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501495/normal_6055f17e3b9df.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383300/normal_600847826359c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470526/normal_5ffa385feefdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407782/normal_6026d343cbfc1.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/35aca6ed-e8f7-49c0-bd0e-532af722a3de/dezevewofelidakutukukoka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ec24569-e465-49d3-85a2-a52a71444415/35552000459.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e711b359-3ec8-4541-a6a3-3f136b67077c/une_fois_pour_toutes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29d93459-a1f1-4613-ac38-ac8b93f51d44/betozo.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_off00011399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11399 5424 bytes
SHA-256: 41126165dac7fe756f1bc1d77d7214a4462721f19462d05130f34e5e41c564f5
font_01_sfnt_off00012619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12619 10924 bytes
SHA-256: c97156d5210154022163a53d44f1805c090dc8eb0cec55cc37f4797bb890f595
font_02_sfnt_off00014b54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B54 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3