Malicious PDF — malware analysis report

Static analysis result for SHA-256 a948eaf19f524c2d…

MALICIOUS

PDF

42.3 KB Created: 2020-03-24 04:09:46 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 30cee272c850ae9dd211c4be73625ea5 SHA-1: e8672d2fbc0e8df8471a6598236b1dfd9385bdca SHA-256: a948eaf19f524c2dcc8fcf32594ddfa405e0145fb6c28e45cad2b5331364cb22
94 Risk Score

Malware Insights

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

The PDF file was identified as malicious by an ML classifier with high confidence. It contains a large number of external links, indicating it functions as a link farm. The document body, though partially corrupted, contains references to URLs that are also present in the extracted URL list. This suggests the primary purpose is to redirect users to potentially malicious content hosted on numerous domains.

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://bartolomeilaw.com/uploads/1/3/0/5/130543084/130543084.html#sinonimo+de+hermano+gemelo
    • http://reapvalue.net/uploads/1/3/0/5/130545932/3030360.pdf
    • http://shelleyhostetler.com/uploads/1/3/0/7/130739525/lizure.pdf
    • http://dentistaparacachorro.com/uploads/1/3/0/7/130775573/926246.pdf
    • http://justaskabby.com/uploads/1/3/0/6/130621305/wofomikonuwazowe.pdf
    • http://imagesbysarahjane.com/uploads/1/3/0/5/130544754/93b43817f98c.pdf
    • http://www.auroraeclipse.net/uploads/1/3/0/8/130813756/4e64ed6b58e.pdf
    • http://vrmp-viprequiredmeetupprevention2010.org/uploads/1/3/0/5/130590287/womegino.pdf
    • http://boldamerica.us/uploads/1/3/0/5/130543538/wupujujatafuwo_fepomizi.pdf
    • http://ncsoundllc.com/uploads/1/3/0/7/130775700/pujosi.pdf
    • http://sophiasprofessionalphotography.com/uploads/1/3/0/6/130639017/wodapupo.pdf
    • http://kingstonclockrepair.com/uploads/1/3/0/8/130813948/livowusevumulam.pdf
    • http://www.leapoffaithcreations.com/uploads/1/3/0/4/130475938/vuxumakusagi.pdf
    • http://islandways.fun/uploads/1/3/0/4/130436202/ferixudavaru.pdf
    • http://bioclenerstanzania.com/uploads/1/3/0/5/130551309/2286350.pdf
    • http://davidedepretto.com/uploads/1/3/0/3/130379485/fajubusun_morewinaf_bugeno_nugobovonuza.pdf
    • http://www.jmchocolate.com/uploads/1/3/0/5/130588207/pewokupukubolenu.pdf
    • http://campusentrepreneur.ca/uploads/1/3/0/7/130738890/batoba-duxazew.pdf
    • http://sydneyflakvo.com/uploads/1/3/0/6/130605351/fikalu.pdf
    • http://charlotteemilypetcare.com/uploads/1/3/0/5/130544091/4837200.pdf
    • http://trueiconic.net/uploads/1/3/0/7/130739934/5945788.pdf
    • http://mos5stepchallenge.com/uploads/1/3/0/5/130589353/5925ef0.pdf
    • http://mccormickreliance.com/uploads/1/3/0/9/130969418/f4a3417ce5ff74.pdf
    • http://therawwarung.com/uploads/1/3/0/4/130483389/dizor.pdf
    • http://lgnrg.net/uploads/1/3/0/2/130289308/gexisek-makifa.pdf
    • http://mgrsti1856q.seamlesstech.biz/uploads/1/3/0/6/130621649/vesaw-xilugipa-nemuno.pdf
    • http://mgrsti1856q.se
    • 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_off00007817.bin
a796e12c6a44a21c34d1108970d0f334a98cb6c3c7ccb2d17e3db0e818557054		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7817 9400 bytes

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