Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4a4de8cf2b301c0…

MALICIOUS

PDF

41.1 KB Created: 2020-05-17 02:53:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1452d37d4192f7694fb283d54ec718d4 SHA-1: 61fb2bb277d77131b6efc9711efcf5a99f769499 SHA-256: e4a4de8cf2b301c0d26d3ae60f7cfe626a05282fe5370f03b5735ccf7841316c
94 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a link farm, with a significant number of external URLs embedded within it. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of numerous links, suggesting a deceptive or manipulative purpose. No scripts were extracted, but the sheer volume of outbound links points towards an attempt to direct users to potentially harmful content or manipulate search engine results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://associazione-camelliarubra.org/uploads/1/3/0/6/130604244/130604244.html#business+information+systems+questions+and+answers
    • http://boonccb.com/uploads/1/3/0/2/130289254/tevosa.pdf
    • http://michaelangelograyson.com/uploads/1/3/0/5/130590499/de3489.pdf
    • http://oliviastone2018.com/uploads/1/3/0/4/130483393/jizanuf-mexusoso-gixunosabovatu.pdf
    • http://marmarworld.com/uploads/1/3/0/8/130873902/rezabamofi.pdf
    • http://soymindful.com/uploads/1/3/1/3/131379015/kijofujewoxilezopot.pdf
    • http://browardcountycriminallaw.com/uploads/1/3/0/7/130776185/4437397.pdf
    • http://hifinternational.com/uploads/1/3/1/3/131382590/woxivakipotawexi.pdf
    • http://contractorwholesale.com/uploads/1/3/0/4/130435641/a2a1e1.pdf
    • http://moxyxo.org/uploads/1/3/0/7/130739480/48e3d3018.pdf
    • http://smithlandscapingandthegreenhouse.com/uploads/1/3/1/6/131637149/wekufojolusov.pdf
    • http://pouliot4irmo.com/uploads/1/3/0/8/130873907/0cbfed0b49376.pdf
    • http://fflpottsgroup.com/uploads/1/3/0/6/130604923/sevum_bodixabovowa_sedoladujexat_dazamarozu.pdf
    • http://isakorp.com/uploads/1/3/0/6/130639334/290004be6a852d6.pdf
    • http://whitelivesalsomatter.org/uploads/1/3/1/6/131636712/f66e0202d.pdf
    • http://noirnooga.net/uploads/1/3/1/4/131407405/jobajiwurapowud.pdf
    • http://cmw522.com/uploads/1/3/0/7/130738525/1079288.pdf
    • http://kmdengineering.net/uploads/1/3/1/8/131871726/nunuloduxe.pdf
    • http://suntnenorocitrau56.com/uploads/1/3/0/7/130738764/9642804.pdf
    • http://sallynailscamphill.com/uploads/1/3/0/7/130738824/goporami.pdf
    • http://peggyformpe.com/uploads/1/3/1/3/131384142/modupezedapaduwu.pdf
    • http://yeticonsulting.com/uploads/1/3/1/0/131070820/pojonofudad_bofimozipugefit_terawo.pdf
    • http://onlinehealtharticles.net/uploads/1/3/0/5/130552097/6725410.pdf
    • http://exceptional-body-language.com/uploads/1/3/0/7/130738822/ruzifulelajazam.pdf
    • http://rockpaperpirate.com/uploads/1/3/0/6/130639933/pogem.pdf
    • http://kerrigoodman.com/uploads/1/3/0/6/130604207/vobezepanevomitalivi.pdf
    • http://kerrigoodman.com/upload
    • 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_off00007577.bin
8ccd2a42f8f9dca7aa2cb6b4a15fe2429f13a03f0723f72a1656621facf654a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7577 10156 bytes

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