Malicious PDF — malware analysis report

Static analysis result for SHA-256 986631552c6d54e3…

MALICIOUS

PDF

47.4 KB Created: 2020-04-05 07:26:59 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e1a9f0931be5d51090df4f448e0d47de SHA-1: 7e2229033306ac80297b21a760506409faae58b4 SHA-256: 986631552c6d54e3d69e1e8a1d8e1f8ea7323b565094ba626af0ee70780f95ab
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, many of which point to similarly structured URLs on different domains, indicating a link farm or SEO spam operation. The document body, though partially corrupted, suggests a 'business plan for cafeteria' lure. The ML classifier strongly flagged this PDF as malicious, and the presence of a large number of external links supports a malicious intent, likely to direct users to potentially harmful content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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 http://asiquescot-id0941.biz/uploads/1/3/0/5/130550764/130550764.html#plan+de+negocios+para+cafeteria
    • http://myhappinesscanvas.com/uploads/1/3/0/6/130604086/5768870.pdf
    • http://felicityfarm.org/uploads/1/3/0/9/130969496/wininup-tegaxiziv.pdf
    • http://vakantiewoning-costablanca.nl/uploads/1/3/0/4/130476035/7822022.pdf
    • http://advantagedroneproductions.com/uploads/1/3/1/4/131482832/6664544e.pdf
    • http://nicolesbadassblog.com/uploads/1/3/0/2/130270889/virejikewenex.pdf
    • http://clayerly.studio/uploads/1/3/0/8/130874101/vimuvikowarom_jubujabenobob.pdf
    • http://serviertransformationdigital.com/uploads/1/3/0/6/130621701/jasufozemabute_xuwir_besap_dupirav.pdf
    • http://mahtx.com/uploads/1/3/0/2/130274145/93e47667.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008f8e.bin
1cb6de9f946487ceb990b09537e7c01c6704a3efd108371b6536722289a06586		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F8E 8848 bytes

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