Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d4afe1b893de54b…

MALICIOUS

PDF

67.2 KB Created: 2020-12-06 18:49:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c448cc0935f7cb015000ea3cc7db862f SHA-1: 5239f73ba08fb52b52a0693d214b5d06451d7645 SHA-256: 8d4afe1b893de54b183cc08d2a543ffb79dd654a145ea47ce043fe1c5f4c4be8
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to redirect users. The presence of an external URI pointing to 'traffset.ru' further supports this. While no scripts were explicitly extracted, the PDF structure and the nature of the heuristics indicate a phishing or malicious redirection attempt, likely delivered as a spearphishing attachment.

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 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://traffset.ru/123?utm_term=logitech+dinovo+edge+pin PDF link annotation
    • https://xatawozenovug.weebly.com/uploads/1/3/4/8/134886035/21853ee16.pdfIn PDF document text
    • https://ropesafubisok.weebly.com/uploads/1/3/4/5/134515157/dazonegewaj_dakisojaj.pdfIn PDF document text
    • https://litaxavuve.weebly.com/uploads/1/3/4/8/134848922/819e63.pdfIn PDF document text
    • https://lifotuvuzaraxur.weebly.com/uploads/1/3/0/7/130775275/711f5bee33d94.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2d559bb-4ce9-48a6-a8cb-f251468c2c5e/safitapizavaxerom.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc79f8081da8a590db1a476/t/5fcbfceb5177ea328cacf12b/1607204075423/borunibitabasoza.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e8580a2757459be2e8d5/t/5fc6079a9d793648405c0000/1606813596407/spoken_english_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6b5c871-d5c3-429a-b82d-740dfff46031/death_the_kid_wallpaper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15111d67-9f7f-426e-8476-cd1866a0c369/29924490916.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/49790277174.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/lufori.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/slideshow_template_ae_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/jaguar_animal_pictures_on_alert.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/xosepirubebovavisegupi.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_off0000c992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC992 4820 bytes
SHA-256: b1cc2d7afd7e8a946d20240d47c08cc4e58d0ac27725abcf3728847def0521cb
font_01_sfnt_off0000da08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA08 11228 bytes
SHA-256: 7be6949d2709cb90f943d87e8759756cf8b93b7a61f92f29e26de9c905d39630

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