Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7dd3c832359ed2d…

MALICIOUS

PDF

32.6 KB Created: 2020-03-14 21:48:25 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c8e7263019a84eab9c49bd73a54d4c9e SHA-1: 8b6142871cec43e72565efff6ce6dcfa7f91240b SHA-256: d7dd3c832359ed2d45864a069e5d9ca7a912640c16c41de3eba23cf31cc7d0c2
94 Risk Score

Malware Insights

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

This PDF document was flagged by a machine learning classifier as malicious. It contains a large number of external links, many of which point to similarly structured URLs on different domains, suggesting a link farm or SEO spamming operation. The primary purpose appears to be to distribute or link to malicious content via these numerous external URLs.

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://tonglewangshangyule.br3h.com/uploads/1/3/0/7/130738949/130738949.html#grey+bed+sheets+and+pillowcases
    • http://www.bankseta2014atstern.com/uploads/1/3/0/7/130776791/wadekowota_vuvama_gosunekig.pdf
    • http://onewesterra.com/uploads/1/3/0/6/130604395/9665421.pdf
    • http://uncommondwellings.com/uploads/1/3/0/2/130287295/edb87d9a1.pdf
    • http://wentcruising.com/uploads/1/3/0/8/130814145/4533687.pdf
    • http://hawaiiislandspirits.com/uploads/1/3/0/2/130272934/7437512.pdf
    • http://www.ryanballonlineportfolio.com/uploads/1/3/0/4/130436094/eaeaf982.pdf
    • http://onshoringphilippines.com/uploads/1/3/0/2/130272360/bdb84.pdf
    • http://goodn3wsgirl.com/uploads/1/3/0/2/130272600/takusobore-kerazeguserali-gejizud-gokivas.pdf
    • http://2findyourhomevps.net/uploads/1/3/0/8/130815097/5268306.pdf
    • http://5250westminsterplace.com/uploads/1/3/0/3/130379522/dubikapem-nofejinarejol-bugagatibep-kukulasiwigidi.pdf
    • http://eloquenceonthebay504.com/uploads/1/3/0/7/130775336/levekamarorupi.pdf
    • http://sonjaweilguny.at/uploads/1/3/0/6/130621487/sanira-kuwabegozamivur-sonep.pdf
    • http://firstclasspainting.org/uploads/1/3/0/9/130969354/1427877cd.pdf
    • http://jetblackcopywriting.com/uploads/1/3/0/6/130621815/wopetadub-mumegilupo.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_off00005929.bin
409c4790f7937aef116c62d833b474cf7ca584eef9ed9546cf36acfb8ce07da5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5929 7196 bytes

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