Malicious PDF — malware analysis report

Static analysis result for SHA-256 036ac6bcbcc12fc9…

MALICIOUS

PDF

42.9 KB Created: 2020-03-11 02:41:04 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1a25d7f1e2fdd0654329a6a7c4ad4978 SHA-1: 13346e5381ecd2747f405d1b95b5369145eab392 SHA-256: 036ac6bcbcc12fc9fff54917f2003e74950922c8c5178f593a8386981e611ca1
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains a large number of external links, indicative of a link farm or SEO poisoning attack. The embedded document body, though heavily obfuscated, contains URLs that are likely intended to redirect users to malicious content or phishing sites. No scripts were extracted, but the sheer volume of external links suggests a coordinated effort to manipulate search results or distribute malware.

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://integritywelding.net/uploads/1/3/0/5/130551166/130551166.html#acute+tubular+necrosis+hyaline+casts
    • http://doggiestyles.net/uploads/1/3/0/6/130621261/nanezodafemokup.pdf
    • http://pdbcpas.com/uploads/1/3/0/7/130775424/4816191.pdf
    • http://fifowear.com/uploads/1/3/0/7/130775598/kirififuguzamofe.pdf
    • http://www.themodernfarmhouse.net/uploads/1/3/0/3/130323091/945803380f79.pdf
    • http://popjetfountain.com/uploads/1/3/0/4/130476632/salumejow-bijaz-mufutaduv.pdf
    • http://armkandycreations.com/uploads/1/3/0/5/130539992/joguronodezab_lajoderuduve_deziwo_fopepeki.pdf
    • http://nasesati.com/uploads/1/3/0/7/130776363/7054183.pdf
    • http://thewaggingtail.nyc/uploads/1/3/0/2/130289553/fa8b3.pdf
    • http://captaingstring.com/uploads/1/3/0/5/130547486/dafipufob.pdf
    • http://www.mybuenosaires.org/uploads/1/3/0/7/130775997/7eb8162552ec.pdf
    • http://davisdesigns307.com/uploads/1/3/0/7/130738881/kezeponagir.pdf
    • http://lessons4life101.com/uploads/1/3/0/7/130738913/jelozaturidipijiv.pdf
    • http://link2evolve.com/uploads/1/3/0/4/130436415/97d6a92efb7.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_off00008078.bin
2cb79abd47d59921eb407781773d0f434056a23263d2fb37a332e55b0b42e54b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8078 7800 bytes

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