Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6a5cbfbe495ea4d…

MALICIOUS

PDF

42.9 KB Created: 2020-04-19 00:56:18 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 436622c526ed7dcbe172c9e497f6bed8 SHA-1: 522bd0f4b10cb00688c7fb3d47e773bbd87e0b0d SHA-256: a6a5cbfbe495ea4dba542482288d36eae198bc5d65a425742347315ac8e84827
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. These links point to various domains, all structured similarly with numeric or slug-based paths, suggesting a coordinated effort to generate traffic or distribute content. The embedded document body text is heavily corrupted, making it difficult to ascertain the exact lure. No scripts were extracted from this sample.

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://improvemyattention.com/uploads/1/3/0/6/130604551/130604551.html#ipa+sounds+of+english+pdf
    • http://lifecyclemgt.com/uploads/1/3/1/4/131438293/diwejanekenov-gadupivo-zilejasigiki-ferumipibum.pdf
    • http://helpeducatethechildren.org/uploads/1/3/0/8/130874324/3b8da65ab194b.pdf
    • http://smithrb3llc.com/uploads/1/3/0/6/130621472/gigavudalobute.pdf
    • http://homesolarfinance.com/uploads/1/3/0/7/130775389/83651.pdf
    • http://harryvizard.com/uploads/1/3/0/6/130639162/693402.pdf
    • http://know-ur-worth.com/uploads/1/3/0/6/130639936/nokirititakag.pdf
    • http://catalinamicrobladinglv.com/uploads/1/3/1/4/131407704/jemosor.pdf
    • http://runningthedelta.com/uploads/1/3/0/6/130621934/tewuvix-misanugedudupu-musozap.pdf
    • http://laurenbriggs.net/uploads/1/3/0/7/130739398/ed3d2ae2e2.pdf
    • http://thecreamteamuk.com/uploads/1/3/0/9/130969891/cdab2d.pdf
    • http://baygbc.org/uploads/1/3/0/5/130550881/76a1af.pdf
    • http://9146718265315491.me/uploads/1/3/1/4/131408183/003acc8692116.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064b3.bin
e239be7198c744821bff58ad5e62ce259065103dbb98bb2fbf85c03718d6dd6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64B3 8668 bytes
font_01_sfnt_off000085bc.bin
0fb340d1f2349d2e512d0c9d4f1c2459f55c7cd6fe08a343f6297257a4c36fdf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85BC 16836 bytes

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