Malicious PDF — malware analysis report

Static analysis result for SHA-256 eff7467a9e96f1be…

MALICIOUS

PDF

36.3 KB Created: 2020-04-07 07:03:17 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-07
MD5: 4356e30460d614ba5457435c7df07d2f SHA-1: 7fc5ee6e594799b1b0d9b98de11ea9411a76cbc8 SHA-256: eff7467a9e96f1bed9fe079310b4c3eddb68af4d9b1fd7bc760c0c3a418b80b2
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or a distribution point for further malicious activity. The document body is heavily obfuscated but contains references to the external URLs. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://barrusmemorialrace.com/uploads/1/3/0/6/130604821/130604821.html#physical+properties+of+ionic+structures PDF link annotation
    • http://meadowcreekindustrial.com/uploads/1/3/0/7/130776757/deguniba_ziwetezo_juxuranefi.pdfIn PDF document text
    • http://playhardathletics.com/uploads/1/3/1/4/131437756/tekulogiwumabuga.pdfIn PDF document text
    • http://anursestouchmicroblading.com/uploads/1/3/0/8/130814286/zedugefutoganibet.pdfIn PDF document text
    • http://natgastrucks.com/uploads/1/3/0/4/130477146/telarexogu.pdfIn PDF document text
    • http://teaysvalleyvolleyball.com/uploads/1/3/0/4/130490399/9203855.pdfIn PDF document text
    • http://devboxtest.ca/uploads/1/3/0/5/130542982/4441128.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

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66DD 7668 bytes
SHA-256: c37e165905f1982141cb28db600e7025a092dcad0bc34b0c958df4e05ed5b8e4

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