Malicious PDF — malware analysis report

Static analysis result for SHA-256 f81446d84f192734…

MALICIOUS

PDF

37.4 KB Created: 2020-03-15 08:52:56 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d72fe29150c4a36308997c46bd0b35f1 SHA-1: b9fbb7fcfc1a5b0fd2dbe585710154d2154e9152 SHA-256: f81446d84f1927340ff011d3f4b0a667bb744d1eec9a4059a115ec7046bcc105
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains text related to 'worksheets' and includes URLs. The primary function appears to be directing users to a vast network of linked websites, likely for SEO manipulation or to serve as a landing page for further malicious activity. No scripts were extracted from this sample.

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://kindspa.com/uploads/1/3/0/6/130620880/130620880.html#year+three+time+worksheets
    • http://woundedwarriorprospects.org/uploads/1/3/0/6/130605122/nebesomewaz.pdf
    • http://msgolfforeacure.com/uploads/1/3/0/5/130539344/jufubonipiriku-gisirutewor-naforu.pdf
    • http://climbingwild.com/uploads/1/3/0/6/130640225/6855425.pdf
    • http://csraisc2.com/uploads/1/3/0/4/130483703/lebikebekaf-wolan-ziponaluko.pdf
    • http://aliciabygalaktika.com/uploads/1/3/0/3/130323124/2603639.pdf
    • http://www.maryryanfarmer.com/uploads/1/3/0/6/130621301/49d3a91fab0f.pdf
    • http://nevadalawguide.com/uploads/1/3/0/7/130776883/mowuru_pumuwapijo_dusifafisebitap.pdf
    • http://funandsun.org/uploads/1/3/0/2/130273733/zaregi.pdf
    • http://lindershelpinghands.com/uploads/1/3/0/4/130488749/pixupuwop-kanodepozotijap.pdf
    • http://www.fmg-goldau.ch/uploads/1/3/0/7/130739020/xomenuvinip.pdf
    • http://clipture.net/uploads/1/3/0/5/130588810/vepefivisan_tizade_gedurodeme_losuvemepak.pdf
    • http://www.mingalarfoods.com/uploads/1/3/0/3/130323260/c7c1fb0976.pdf
    • http://christianwallfitness.com/uploads/1/3/0/5/130544089/9764268.pdf
    • http://jillbrookover.com/uploads/1/3/0/6/130622076/3664351.pdf
    • http://shirazvisinko.com/uploads/1/3/0/6/130604803/laluzu.pdf
    • http://www.kkmediaagency.com/uploads/1/3/0/5/130588487/voralegesajafepe.pdf
    • http://www.newpathorg.com/uploads/1/3/0/3/130323097/pinibofubegaja.pdf
    • http://www.tunasfoodcorner.com/uploads/1/3/0/7/130738673/7256719.pdf
    • http://www.onlinemarketing-thai.com/uploads/1/3/0/4/130488741/5229296.pdf
    • http://miprimapromediohoy.com/uploads/1/3/0/5/130588685/68a8300.pdf
    • http://www.lenoptic.com/uploads/1/3/0/6/130621213/rifemaka.pdf
    • http://livingstonesmemorials.com/uploads/1/3/0/7/130776678/4873758.pdf
    • http://www.bathprivateclients.co.uk/uploads/1/3/0/5/130542920/290b9c.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_off00006bac.bin
641a9155b138b21716a20f7d0ca841e0d038da9c63664d1df13b439d267c5721		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BAC 7140 bytes

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