Malicious PDF — malware analysis report

Static analysis result for SHA-256 3be0f1527c79cd3f…

MALICIOUS

PDF

33.7 KB Created: 2020-03-12 03:43:31 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1dac8211abdb1717200e6951f8239da9 SHA-1: f520715394024c3952ef447d089f2d47fffbb618 SHA-256: 3be0f1527c79cd3f0e81d371de640ca4daf9fc0aa364d35c4baef6cdcb5456a3
94 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or redirection scheme. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves directing users to potentially harmful external resources through these embedded links.

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://twistedsugarut.com/uploads/1/3/0/4/130477287/130477287.html#om+jai+jagdish+hare+aarti+songs+pk
    • http://whiskysurvivor.com/uploads/1/3/0/2/130274097/gutisopigeke.pdf
    • http://thestageoflife.us/uploads/1/3/0/6/130604304/de23f0ca8eb.pdf
    • http://carbuzzznproductions.com.au/uploads/1/3/0/4/130483402/8543942.pdf
    • http://rebelunique.co.uk/uploads/1/3/0/4/130489467/texuderul_kitopevupawusub.pdf
    • http://stagcroatia.net/uploads/1/3/0/5/130590059/muwokavuxamijifu.pdf
    • http://roryward.com/uploads/1/3/0/2/130291485/resagajomuwabuk.pdf
    • http://urbanparkology.net/uploads/1/3/0/5/130589097/kutofebuvu.pdf
    • http://www.jc-mixology.com/uploads/1/3/0/6/130620372/3236450.pdf
    • http://flowerhouseict.com/uploads/1/3/0/5/130543198/sunibovud_lowex_karofaxifekuv_rapum.pdf
    • http://my-family-lore.com/uploads/1/3/0/6/130604395/c39bc80ab44491.pdf
    • http://www.coffee-a-roma.com/uploads/1/3/0/7/130739688/2464047.pdf
    • http://brosrf.org/uploads/1/3/0/7/130776749/wakeduzag-kabidomonerofa-mamisumu.pdf
    • http://thecoinmint.com/uploads/1/3/0/3/130313241/7c8f0.pdf
    • http://dosnorte.com/uploads/1/3/0/6/130620320/suxorijukiwefi.pdf
    • http://commongroundbyronbay.com/uploads/1/3/0/3/130380084/4533759.pdf
    • http://www.noiseartisan.com/uploads/1/3/0/6/130620861/4071859.pdf
    • http://dirtytownlakewood.com/uploads/1/3/0/6/130639423/jesagozobu-povajokegejiw-zewuzuna.pdf
    • http://rethinking.biz/uploads/1/3/0/3/130379627/fegemuj.pdf
    • http://resgroups.net/uploads/1/3/0/6/130620728/lojukuzexumogujo.pdf
    • http://ayenmall.com/uploads/1/3/0/2/130289611/5747177.pdf
    • http://corvidaewines.com/uploads/1/3/0/2/130272414/9188981fc3f.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_off00005d7a.bin
117e36166ae11fa43d04b50229a45dfdb7429387e470a67418a773949be84ff9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D7A 7068 bytes

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