Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc8a42edfda7f8f9…

MALICIOUS

PDF

40.1 KB Created: 2020-04-07 09:58:11 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1bb0bbd68472dbe1267a2c43ceb5445f SHA-1: 9d389edeeebea9459eb331df4a499c1f7f2ef3fc SHA-256: fc8a42edfda7f8f9c43a705959ce125e17918b164a3f095df31375a7eeff0370
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains a URL that points to a preparation guide for potatoes, suggesting a lure. The primary function appears to be directing users to a network of linked PDFs hosted on various domains, likely for SEO spam or to distribute further malicious content.

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://asongintheirhearts.org/uploads/1/3/0/4/130494801/130494801.html#preparacion+de+tierra+para+papa
    • http://amyjlane.com/uploads/1/3/0/6/130621634/kajupapono.pdf
    • http://malevolentminds.com/uploads/1/3/0/7/130775265/kadawusif.pdf
    • http://creepyheadshop.com/uploads/1/3/0/7/130775269/23fe2453a999f24.pdf
    • http://advancedconsumersolutions.com/uploads/1/3/0/4/130483895/1073046.pdf
    • http://ditchy.org/uploads/1/3/0/8/130814161/9f28ff.pdf
    • http://thewallflowerwithwanderlust.com/uploads/1/3/1/4/131406473/1cad5.pdf
    • http://homemadewitchcraft.com/uploads/1/3/0/7/130776277/d601a949ca7.pdf
    • http://pinoyinternetincome.com/uploads/1/3/0/9/130969816/rilika-lotigutomi.pdf
    • http://spatialperspectives.org/uploads/1/3/0/6/130621651/kutikugumuw.pdf
    • http://epiphanrentals.com/uploads/1/3/0/2/130287871/8aee7c0fb1dc59.pdf
    • http://eruchadams.com/uploads/1/3/0/6/130604250/f2238955902c.pdf
    • http://recoveringfundamentalist.com/uploads/1/3/0/6/130639450/tometexutigoze_xivejupisoxe.pdf
    • http://mcypaa41.com/uploads/1/3/0/2/130271205/ebf4930951.pdf
    • http://shrunkies.com/uploads/1/3/0/4/130436402/95e8365f0.pdf
    • http://enmithtrejoministries.org/uploads/1/3/0/7/130776821/xomikodosiku.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_off0000732b.bin
69e4f4f6139446c8446327f4457ecda173c36fa299b2a03d1f9552487489dcc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x732B 8320 bytes

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