Malicious PDF — malware analysis report

Static analysis result for SHA-256 121d6e432273316e…

MALICIOUS

PDF

48.9 KB Created: 2020-03-24 09:40:17 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 024b503fbdac45207316d109903173fd SHA-1: 1fa04c4fed4de9994c48a22d0b64a09188394b80 SHA-256: 121d6e432273316efd414117cce4e7a031c0c69df22337e4838b3e71eef83504
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains text related to consumer attitudes and references the wkhtmltopdf generator, suggesting a potential lure or SEO spamming campaign. No scripts were extracted, but the extensive linking pattern is indicative of malicious intent, possibly to drive traffic or distribute further payloads.

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://ebmccallanbuildingltd.com/uploads/1/3/0/5/130588802/130588802.html#actitudes+del+consumidor+mexicano
    • http://bryhern.com/uploads/1/3/0/3/130323454/85a4ebf8851b.pdf
    • http://www.madraschristian.com/uploads/1/3/0/7/130775220/vafedeveke.pdf
    • http://www.misols.org/uploads/1/3/0/6/130604081/947684.pdf
    • http://verwarming.blockdias.be/uploads/1/3/0/3/130313786/putiw_jinowozujopolew_penafe.pdf
    • http://sattyink.com/uploads/1/3/0/6/130639024/pitipuk.pdf
    • http://firstway.ca/uploads/1/3/0/6/130620222/tamav_sobaxivet_xiloxuwawe.pdf
    • http://agent-attire.com/uploads/1/3/0/5/130589115/folokijup_somedimedivupob.pdf
    • http://postmaster.autoneltempo.com/uploads/1/3/0/7/130775244/xamupodasegowida.pdf
    • http://mx.fieldsauction.net/uploads/1/3/0/4/130476469/jumagulaj-zajugelil-gabeleve.pdf
    • http://www.kissyourcravingsgdbye.com/uploads/1/3/0/6/130620612/df94e2a.pdf
    • http://coloradopotcast.com/uploads/1/3/0/7/130776875/bd6f124.pdf
    • http://www.adelaidegasfitter.com.au/uploads/1/3/0/5/130588821/a7c0b40ba5ff.pdf
    • http://owr.world/uploads/1/3/0/6/130604501/dimufekefadura.pdf
    • http://columbinecabinsco.com/uploads/1/3/0/5/130540359/dalobu-jewiperemaxefeb-fufapiwebed-patugawawefi.pdf
    • http://salenbientrucking-excavating.co/uploads/1/3/0/4/130483860/5a6cc6.pdf
    • http://halfmana.com/uploads/1/3/0/7/130739247/18396.pdf
    • http://kuchnienawymiarslask.pl/uploads/1/3/0/5/130539912/8484780.pdf
    • http://radiodagen.nl/uploads/1/3/0/2/130288861/rawevurawogipem_xabaz.pdf
    • http://agencebreizstore.com/uploads/1/3/0/3/130379627/6495114.pdf
    • http://sweettuth.shop/uploads/1/3/0/6/130620890/pozudujuta-wifazotenobe-jogafafuluva.pdf
    • http://madisonhoteldemo.com/uploads/1/3/1/0/131070458/13126ac232745e.pdf
    • http://webmail.collegefactory.org/uploads/1/3/0/6/130639884/kizizegovigixowora.pdf
    • http://ealawrayauthor.com/uploads/1/3/0/5/130550812/baxubexitu.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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008194.bin
a7e14d82359983ff615eab5b45f61e2cb37b9a9d566030ebd1ec03929a514dc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8194 8836 bytes
font_01_sfnt_off0000a1e4.bin
fc0bcc9d08d908b8b1287d0ab2df4e3a5be78b1d1690d8efe3ff9d2c54ab5679		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1E4 16064 bytes

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