Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd1cd9a3f6a0558f…

MALICIOUS

PDF

30.2 KB Created: 2020-04-01 22:11:02 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c7af37022487446e705d74c88b1a160c SHA-1: 66737872e4e308f93867c676b698abe743879d33 SHA-256: dd1cd9a3f6a0558f477ec332cf1a82e2f7d741803b7ee9d6949467387d63cb15
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, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The embedded document body text, though partially corrupted, includes a URL that is also present in the list of external links. This suggests the primary purpose of the PDF is to act as a link farm, potentially for SEO manipulation or to distribute further malicious content via the linked PDFs.

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://prorighty.com/uploads/1/3/0/6/130639884/130639884.html#peach+and+daisy+porn
    • http://angelajanus.info/uploads/1/3/0/3/130313213/segolarutepu-sozorusulidoz.pdf
    • http://hesdad.info/uploads/1/3/0/3/130312976/46319e9bc.pdf
    • http://localinksprintingsystems.com/uploads/1/3/0/8/130874517/dogifix.pdf
    • http://knolling.club/uploads/1/3/0/3/130379342/xifidurepux-pemutigabap.pdf
    • http://kylestevenanderson.com/uploads/1/3/0/6/130621209/rorolisiduj.pdf
    • http://gongxiangjiaotong.com/uploads/1/3/0/5/130590243/aa8ed265.pdf
    • http://elseorganizing.com/uploads/1/3/0/3/130323932/miposiroxifuluza.pdf
    • http://safesontario.com/uploads/1/3/0/6/130620840/3748876e873.pdf
    • http://tylerbradleyresume.com/uploads/1/3/0/6/130639966/fc9ff7d481.pdf
    • http://areducationalsolutions.com/uploads/1/3/0/5/130588693/nodaramavawosisozex.pdf
    • http://activecanadatrading.com/uploads/1/3/0/5/130543087/gupimibufe.pdf
    • http://homoagenda.com/uploads/1/3/0/7/130738946/javagukemopixez.pdf
    • http://landhawkrealty.net/uploads/1/3/0/4/130488875/e90d0.pdf
    • http://cafeessencebendigo.com/uploads/1/3/0/7/130775396/balidasowut.pdf
    • http://tnt-design-23.com/uploads/1/3/0/8/130874492/gajezaxiluvewesepumi.pdf
    • http://mta-sts.mail.awps.com/uploads/1/3/0/6/130621096/2070127.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_off000054ad.bin
a031604b924668b51375d1b67ba57257a8d0b6680de829bbab5ad037e182e545		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54AD 5640 bytes

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