Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac29c9307335ffac…

MALICIOUS

PDF

42.9 KB Created: 2020-03-27 05:26:25 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e1343fc188191faa535cd122404b5d74 SHA-1: 2c54b2296b3a7a504af3b44be4a642f0af2d1ae3 SHA-256: ac29c9307335ffac8dea00c374a35b838c6c7b44ef71524b17b3e5c1cf2da8ab
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to other PDFs hosted on unrelated domains. This behavior is indicative of a link farm designed to manipulate search engine rankings or distribute malicious content. The primary URL, http://maars.nyc/uploads/1/3/0/9/130969774/130969774.html#canciones+de+mariachi+para+boda+de+oro, appears to be the entry point to this network of links. No scripts were extracted, but the heuristic firings strongly suggest a malicious intent to redirect users to potentially harmful content.

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://maars.nyc/uploads/1/3/0/9/130969774/130969774.html#canciones+de+mariachi+para+boda+de+oro
    • http://www.myfuneralmatters.co.uk/uploads/1/3/0/2/130272638/nisuvojojar-zusegowimix.pdf
    • http://buy-arts.net/uploads/1/3/0/6/130620833/vudevavaw_mevimanuxuwuke_mubidenibig_fogelofisi.pdf
    • http://www.whitetailpredator.com/uploads/1/3/0/4/130478067/1b2f1b043dfb99.pdf
    • http://www.innovationpreparatorycharter.com/uploads/1/3/0/9/130969768/69c0e1c.pdf
    • http://nakedladyquilts.com/uploads/1/3/0/6/130639593/duwujot-xabepavajivigol-tovuken.pdf
    • http://protax8.com/uploads/1/3/0/8/130814923/20d04.pdf
    • http://austinxdesigns.com/uploads/1/3/0/5/130590461/xexofemipewa_vitema_pixiwujevolupoz_tumanezigagapus.pdf
    • http://terpbrain.com/uploads/1/3/0/7/130739590/zudevabenodigutuke.pdf
    • http://blackwoodsounddesign.com/uploads/1/3/0/4/130435821/6693679.pdf
    • http://bmc-properties.com/uploads/1/3/1/1/131164109/cfd4d6001a3275d.pdf
    • http://expertwitnessservices.net/uploads/1/3/0/7/130775391/87285124bf101.pdf
    • http://coolmanraulh.com/uploads/1/3/0/6/130605346/5889196.pdf
    • http://bigbendcollectibles.com/uploads/1/3/0/3/130313088/boziwokawinigot_lapixujuzegan_bimazidebil_tobedine.pdf
    • http://tennieconstruction.com/uploads/1/3/0/6/130639591/6042719.pdf
    • http://cambiosautomaticos.net/uploads/1/3/0/6/130639646/novejifix_bivife_mafituko_lisotiwilirivul.pdf
    • http://hostmaster.nickboyweddingvideo.co.uk/uploads/1/3/0/6/130621043/a62f20eaeb7a30d.pdf
    • http://modwsu.com/uploads/1/3/0/6/130620670/5869395.pdf
    • http://mayahypnotherapy.com/uploads/1/3/0/8/130814393/gevanofap.pdf
    • http://www.alohainspections.com/uploads/1/3/0/5/130540402/04e92a.pdf
    • http://connectingmoments.co.nz/uploads/1/3/0/6/130639800/d973da135023.pdf
    • http://33grp.com/uploads/1/3/0/6/130639945/92ead35cdb8e6b.pdf
    • http://tombidjs.co.za/uploads/1/3/0/6/130604892/wivozisifo_warivagesi_difunedubukez_rexidegubozu.pdf
    • http://www.testandcare.com/uploads/1/3/0/4/130483836/fdf6a09961.pdf
    • http://www.cornellcraigue.com/uploads/1/3/0/2/130289377/b4ec5ec61e224b.pdf
    • http://www.eternalfreespirit.com/uploads/1/3/0/8/130873983/f832c88af22b.pdf
    • http://tombidjs.co.za/uploads/1/3/0/6/130604892/wivo
    • 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_off00007d0c.bin
296f97b846a49f8d7ad270b605b79e4d59fb40c7e54d2680154c28998dd23c06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D0C 8976 bytes

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