Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0144e9c96787cd8…

MALICIOUS

PDF

60.8 KB Created: 2020-12-15 16:47:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f341cd4846357f712c90b3f459a6ea3 SHA-1: d174594c2bbcc3a81f6d4acc4e7fce0bc34b7680 SHA-256: a0144e9c96787cd82499595ab1013886321683a9d5c317630312013c349ce8ae
96 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection attempt. The ML_NYX_PDF_MALICIOUS heuristic also strongly indicates malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a malicious document designed to drive traffic to external sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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://traffine.ru/123?utm_term=serial+ata+hard+drive+2.5+inch
    • https://gozexorajive.weebly.com/uploads/1/3/4/6/134610068/4335913.pdf
    • https://wekegakusujesal.weebly.com/uploads/1/3/4/2/134266445/05d953f2095.pdf
    • https://novafonofijufi.weebly.com/uploads/1/3/4/4/134480525/getuwobo_terikuw_devekivug.pdf
    • https://lemoxubasox.weebly.com/uploads/1/3/4/3/134329143/vovozilemanup.pdf
    • https://solovetimu.weebly.com/uploads/1/3/4/8/134879252/4429013.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc69a0ee2fce462bcb385cb/t/5fcc3d597ae85b53b284b9d6/1607220569901/canon_i_runner_2530i.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5e009ee0f32b874b41a9/1606376962848/top_osu_skins_2019.pdf
    • https://static1.squarespace.com/static/5fc5559ebd14ff0dd2ba110b/t/5fd6d789034a586a4f558901/1607915402417/76348932285.pdf
    • https://static1.squarespace.com/static/5fc5451ac30a162e0c6f580a/t/5fd6935189566e781f56f190/1607897939907/69965034499.pdf
    • https://s3.amazonaws.com/ravuxudibure/aha_cholesterol_guidelines_2018_circulation.pdf
    • https://static1.squarespace.com/static/5fc57cef12facd59cecc0b9a/t/5fc85d6a26a3037b43399fc3/1606966634274/red_rose_tattoo_on_hand_meaning.pdf
    • https://s3.amazonaws.com/jedaxopopuko/fun_home_alison_bechdel_free.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd089f9d104e5f152f5e49/1606224031072/fermats_little_theorem_aops.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b4e3.bin
220f987c0aa03cf5cf9291769f78871f6d90eb1a00642de92f7c4c54d742fc11
pdf-font-stream PDF embedded font (sfnt) at offset 0xB4E3 5300 bytes
font_01_sfnt_off0000c6ef.bin
093da958b9aea09c7d71958b2f1c83001d5ba9edfad7ff832bc1f5cc6c93acfb
pdf-font-stream PDF embedded font (sfnt) at offset 0xC6EF 9256 bytes