Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed333ad936c652dd…

MALICIOUS

PDF

41.1 KB Created: 2020-03-29 12:42:25 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 02893d6a719ac97de76b9d9453df7851 SHA-1: 4ef91c97f5407fe8af19de89683697a576b7a37c SHA-256: ed333ad936c652dd2c340702c12d4d1eb47fa79796c929d5f2a51cf4dfeec63b
92 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to other PDF files hosted on various domains. The document body text and embedded URLs suggest a lure to download a manual, which is likely a pretext to deliver a malicious payload. The ML classifier strongly indicates maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a large number of external links, typical of SEO poisoning or link farm abuse for distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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
  • 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://74-123-77-90.mgwnet.com/uploads/1/3/0/7/130738647/130738647.html#str-dh550+manual+download
    • http://addoadventures.com/uploads/1/3/0/5/130589435/wamitomazi.pdf
    • http://www.johnwesleyhardin.it/uploads/1/3/0/6/130621384/gitubezuvoliloteba.pdf
    • http://pinballalley.ca/uploads/1/3/0/3/130313015/nelipep.pdf
    • http://easst-collaborative.org/uploads/1/3/0/6/130640197/5062820.pdf
    • http://americanoffroadnv.com/uploads/1/3/0/7/130776775/6971322.pdf
    • http://berkshireartsacademy.com/uploads/1/3/0/8/130874435/bexitopifi.pdf
    • http://kingdronemedia.com/uploads/1/3/0/4/130483142/9922d78f7.pdf
    • http://timefordiscovery.com/uploads/1/3/1/0/131071188/8366953.pdf
    • http://pushthenote.com/uploads/1/3/0/2/130274169/wupubaxibuko.pdf
    • http://erlebnisguttannen.com/uploads/1/3/0/5/130590384/4117317.pdf
    • http://thejoyoftheliving.com/uploads/1/3/0/7/130775688/tonotefumobab.pdf
    • http://my-zk.com/uploads/1/3/0/2/130291822/bazaxedapedilamajut.pdf
    • http://humphreysfreelancemedia.com/uploads/1/3/1/4/131409822/344291.pdf
    • http://appliedlc.com/uploads/1/3/0/6/130604935/5418600.pdf
    • http://jillianberryart.com/uploads/1/3/0/5/130589231/5296710.pdf
    • http://relationaltransformation.org/uploads/1/3/0/4/130435927/1108933.pdf
    • http://wabi-kusa-australia.com/uploads/1/3/0/7/130775628/nuzajezapinuwawovubo.pdf
    • http://dbmaintenanceservices.com/uploads/1/3/0/8/130813416/mexuzel.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_off000075e4.bin
abb8b27afef491596c1837efee37238533befda602a1ca6345db053130466343		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75E4 8676 bytes

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