Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2a17bfea61b9b99…

MALICIOUS

PDF

34.0 KB Created: 2020-04-03 07:28:07 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d01557be52b54f6463cbe634ce328c1b SHA-1: 77a1a63499c8d26c6880f894adac644303ff6bfa SHA-256: f2a17bfea61b9b990f822dc001f13d33deb049938204be4262f116c3341b2d93
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted on various domains, indicating a link farm or distribution mechanism. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous SEO-like links suggests an attempt to manipulate search results or distribute further payloads. 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://weaepro.net/uploads/1/3/1/0/131070197/131070197.html#simbolos+electricos+europeos+y+americanos+pdf
    • http://ameliaislandgiftshop.com/uploads/1/3/0/7/130740129/7700982.pdf
    • http://ronleax.com/uploads/1/3/0/4/130436147/josateno.pdf
    • http://my-pof-online.com/uploads/1/3/0/8/130874432/ad2b6f83.pdf
    • http://davethielrenovations.com/uploads/1/3/0/4/130435631/4e2e263ad2d4115.pdf
    • http://powerballfb.online/uploads/1/3/0/7/130775907/15cce2fff3dd5d.pdf
    • http://bitesizeed.com/uploads/1/3/1/1/131164124/9244a414e.pdf
    • http://lunarhalofilms.com/uploads/1/3/0/6/130620510/jepasop.pdf
    • http://directinservicetrainingtexas.com/uploads/1/3/0/5/130540172/xoxonunapozuneb.pdf
    • http://smartleveltable.com/uploads/1/3/0/3/130313271/nupunaxuroneli-gixuk-kusorapab-vuluki.pdf
    • http://saltnshe.com/uploads/1/3/1/0/131070733/6730af5e6.pdf
    • http://whereis230.com/uploads/1/3/1/0/131070894/4197034.pdf
    • http://vilven.com/uploads/1/3/0/2/130291766/59321cae.pdf
    • http://honda2008.com/uploads/1/3/0/5/130551714/bb51e38.pdf
    • http://rsworldtravel.com/uploads/1/3/0/7/130775310/vexexefutupazojako.pdf
    • http://votejeremygarza.com/uploads/1/3/0/5/130543020/lovajipinogezoj_wibanazur_zemineted_gefegoda.pdf
    • http://patrickmattza.com/uploads/1/3/0/6/130604554/d60c9.pdf
    • http://gabrielmobolaji.com/uploads/1/3/0/6/130604034/87d0da.pdf
    • http://galavisconsulting.com/uploads/1/3/0/6/130621455/4430522.pdf
    • http://valenzuelaton.com/uploads/1/3/0/6/130604588/beteg.pdf
    • http://adniltonalves.com/uploads/1/3/1/0/131071308/9951578.pdf
    • http://hendrixproperties850.com/uploads/1/3/0/5/130543418/pizumonesanir_fuluzipulod_zepulufe.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_off00005d56.bin
0666750f2370080ecff70e8c000c3d0b1faa7eb5d7b56ea6da9a79fe7b70b2f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D56 7696 bytes