Malicious PDF — malware analysis report

Static analysis result for SHA-256 330c706d942b2a66…

MALICIOUS

PDF

32.4 KB Created: 2020-11-08 11:45:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: f2989ca28f272fe746fdf01da122d2df SHA-1: e760b7ed163d6c1bc8b877dfc9100ee289d0a2e1 SHA-256: 330c706d942b2a66d8dc43985df98e417c6e46b2401510b86a4d450f2b81991b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. One of the embedded URLs, https://trafficel.ru/aws?keyword=treasure+valley+livestock+market+report, is suspicious and likely leads to malicious content or a phishing page. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://trafficel.ru/aws?keyword=treasure+valley+livestock+market+report PDF link annotation
    • https://misutinulil.weebly.com/uploads/1/3/1/4/131407711/fanarukok.pdfIn PDF document text
    • https://zanelonovubut.weebly.com/uploads/1/3/4/3/134315015/kivanozesudupipiz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393190/normal_5fa79ce3a7a6b.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/fa2adb4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403407/normal_5f9d292875ba9.pdfIn PDF document text
    • https://pevinuwipe.weebly.com/uploads/1/3/0/8/130873962/3740324.pdfIn PDF document text
    • https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/2f4425620b318.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365636/normal_5f96fb2567dc4.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/2ca5989e-dc7f-4e50-89ea-43dcc2abd5e7/legends_of_the_guardians_the_owls_of_ga27hoole_123movies.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/80249159856.pdfIn PDF document text
    • https://s3.amazonaws.com/fokena/pirexonufugezazuxusinere.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/torrent_game_of_thrones_s8.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_off000040c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x40C2 5256 bytes
SHA-256: 6287ed67265f65c79c6f555af6689d23523f4d05d50b19dc9ecf0faa4de38b7f
font_01_sfnt_off0000529b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x529B 10012 bytes
SHA-256: c621dbcb8aca2ea297c87aae6f19640784dc843b0bcef56b5c18436f5bb60e1f

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