Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e54d61c8fba5896…

MALICIOUS

PDF

39.6 KB Created: 2020-03-21 03:12:00 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 22cc3cb2352ad8e313d3b56b79d784ed SHA-1: 0d301aa52c2982f048148c47ae0302b24a2c6a67 SHA-256: 6e54d61c8fba58964006279a07a1a497d74d56137a622024871bb58ea8161f41
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified as a link farm, suggesting a deceptive purpose such as SEO manipulation or hosting malicious content. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs further supports this assessment. No scripts were extracted, but the sheer volume of outbound links is highly suspicious.

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://block1949-asu.com/uploads/1/3/0/6/130639222/130639222.html#diferencias+entre+derecho+civil+y+mercantil
    • http://hostmaster.bridgendtennis.club/uploads/1/3/0/6/130604635/xerijaxomo.pdf
    • http://mx.mitzihayesyoga.com/uploads/1/3/0/2/130272554/mizufi.pdf
    • http://cust0m1ze.com/uploads/1/3/0/4/130435876/3314228.pdf
    • http://carvedinpaint.com/uploads/1/3/0/4/130483263/jenonuw_reresuxivodaz_guvotuwike_dilutebokokupap.pdf
    • http://marsmannen.agency/uploads/1/3/0/5/130551202/zibomel-vonaladenepe.pdf
    • http://gentlepawstherapypet.org/uploads/1/3/0/8/130813747/5479668.pdf
    • http://pathfindermusicgroup.net/uploads/1/3/0/4/130476183/c19df2.pdf
    • http://singaporenewexecutivecondo.com/uploads/1/3/0/5/130538992/namageg.pdf
    • http://tenzome.com/uploads/1/3/0/5/130588934/xined_lirevuzixe_pomotuzi.pdf
    • http://www.isucssa.org/uploads/1/3/0/4/130488227/duzugezoja.pdf
    • http://courtneyharris.net/uploads/1/3/0/5/130544086/gemuwojusosokawefexu.pdf
    • http://rejuveclinica.com/uploads/1/3/0/8/130874519/b9f4d4.pdf
    • http://www.genuinecollection.ca/uploads/1/3/0/4/130488199/xutitukozum_numurevuwaxer_kerureb.pdf
    • http://mail.becketbenders.com/uploads/1/3/0/4/130435943/rijeboruresaku-zabijow-dukijivuzamever-kemuti.pdf
    • http://cooyyah.org/uploads/1/3/0/7/130739180/3680357.pdf
    • http://moocrewcreations.net/uploads/1/3/0/6/130604341/kotekalaw_tatuwafujo_virikan.pdf
    • http://transcendtext.com/uploads/1/3/0/6/130640101/db972c.pdf
    • http://ushomes888.com/uploads/1/3/0/4/130435570/10cbdcc0fa2ceec.pdf
    • http://coolmanhaulage.net/uploads/1/3/0/6/130605440/268d1e159a95.pdf
    • http://mail.ambitus.gr/uploads/1/3/0/3/130323517/2027786.pdf
    • http://www.huej.org/uploads/1/3/0/3/130379894/muwul.pdf
    • http://proyectostitanium.com/uploads/1/3/0/8/130813398/godimerosuru.pdf
    • http://www.abdulnassani.com/uploads/1/3/0/8/130814351/kamewesujugarujiliw.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_off00007309.bin
95143b832617886dd17e44bd1c04dad304cbadce7e79a300039a4284ceab11b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7309 7928 bytes

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