Malicious PDF — malware analysis report

Static analysis result for SHA-256 39c789b2835cfa9a…

MALICIOUS

PDF

52.6 KB Created: 2020-04-09 13:33:29 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d642bd97998c42a498ebce36fc23af26 SHA-1: 9fc20cba3f24b7c932791e1af8538dd372174f96 SHA-256: 39c789b2835cfa9af7bd818ce5ed33ebbc228dd12e36c4c205a87eb68bad8530
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files on unrelated domains, indicating a link farm or SEO spam tactic. The document body, though partially corrupted, contains text related to project diagnostics and mentions wkhtmltopdf, suggesting a deceptive lure. The primary URL, http://stayingatbermudabay.com/uploads/1/3/0/9/130969072/130969072.html#diagnostico+del+problema+de+un+proyecto, is likely the intended destination for the user, potentially leading to further malicious content or phishing attempts.

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://stayingatbermudabay.com/uploads/1/3/0/9/130969072/130969072.html#diagnostico+del+problema+de+un+proyecto
    • http://greenifysomalia.org/uploads/1/3/0/5/130551746/lovawu.pdf
    • http://worldclasssurffoundation.com/uploads/1/3/0/5/130551700/e59f14a70.pdf
    • http://safewithmenow.com/uploads/1/3/0/7/130775876/5059877.pdf
    • http://protechphotography.com/uploads/1/3/0/6/130621812/gesadax.pdf
    • http://njmplumbingandheating.com/uploads/1/3/0/6/130605074/7322259.pdf
    • http://palmerallen.net/uploads/1/3/0/2/130289592/12dc3.pdf
    • http://pvallc.net/uploads/1/3/0/2/130289172/75ff18cee92fda.pdf
    • http://edocig.com/uploads/1/3/0/8/130874667/6545219.pdf
    • http://sweetmaddies.com/uploads/1/3/0/5/130543032/xurekefemotugefa.pdf
    • http://vaoffroadriders.com/uploads/1/3/1/0/131071167/xiwaparemolomok_sefulozeninu_sufag.pdf
    • http://wanigatungapictures.com/uploads/1/3/0/7/130775049/9701970.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000848d.bin
4fbc8eabed5d9060ff59ada181ed1f0ec09b122f3a53cb291803d34a9468451e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x848D 9020 bytes
font_01_sfnt_off0000a4e2.bin
83459e82cebe561b9e65dda6a09953c9e35f75e5df0fa62a624e1833cc5b8086		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4E2 1708 bytes
font_02_sfnt_off0000ad49.bin
1d1fa5121415f8f5353993473374918b9d2a38f433752094af4cce5d3be72c8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD49 16312 bytes

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