Malicious PDF — malware analysis report

Static analysis result for SHA-256 f260c78abbe9415d…

MALICIOUS

PDF

36.5 KB Created: 2020-05-22 08:57:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 339600318b6d7cd1164b7d5e73065a8a SHA-1: 1de2d7b5264625a6ae18bc54d60efea457c33387 SHA-256: f260c78abbe9415dde8e67f62a66a4139ac52a7637205260e9aceb7bd6201205
94 Risk Score

Malware Insights

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

This PDF document is classified as malicious by an ML model with high confidence. It contains a large number of external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The document body, though partially corrupted, suggests a lure related to "Christmas piano sheet music free pdf". The primary attack pattern involves directing users to a network of suspicious URLs, likely to host further malicious content or phishing pages.

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://stpaulamechurch.net/uploads/1/3/0/6/130639215/130639215.html#christmas+piano+sheet+music+free+pdf
    • http://technoges.net/uploads/1/3/0/4/130436014/kufiwatemakake.pdf
    • http://mieldercarelaw.com/uploads/1/3/2/3/132303337/fcbb515d48f.pdf
    • http://mountainstatehr.com/uploads/1/3/0/5/130539652/0777982bdee9f54.pdf
    • http://maddieberrymutts.com/uploads/1/3/0/4/130476082/movefinuxurogoserero.pdf
    • http://sharonechin.com/uploads/1/3/0/7/130776104/fc430f5fe4cf91.pdf
    • http://quiltjudgingseminar.org/uploads/1/3/0/7/130739431/52a5d1f581aac.pdf
    • http://sparklepalacekidsspa.org/uploads/1/3/1/6/131637928/2991768.pdf
    • http://drthatch.online/uploads/1/3/1/8/131856285/wedajifuxape-kowonegipano-xedidowero-mukemapesene.pdf
    • http://ridingpointradio.net/uploads/1/3/0/6/130604225/7975410.pdf
    • http://therookieroundtable.com/uploads/1/3/0/8/130814788/mevawixubata.pdf
    • http://ebo-exam.com/uploads/1/3/1/6/131606782/8633d43.pdf
    • http://loihp.com/uploads/1/3/0/6/130620755/2399745.pdf
    • http://politicsofeducation.org/uploads/1/3/1/0/131070452/juzatij_tifevivowifej_vavosixavufiwix_peruzox.pdf
    • http://guaranteeexteriors.com/uploads/1/3/1/4/131483219/7650664.pdf
    • http://fireandiceservice.com/uploads/1/3/1/3/131383655/089a3c8f.pdf
    • http://jordansroofing.net/uploads/1/3/1/4/131407887/262924.pdf
    • http://generaltransactions.com/uploads/1/3/1/3/131380971/zaxewal.pdf
    • http://ventnorhappyhourscottage.com/uploads/1/3/0/6/130620483/6f90d0614b.pdf
    • http://firstpositioncommunications.com/uploads/1/3/1/4/131406354/wifosolujatisosu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005425.bin
6fab78697de8e8ad69909eb279e00a98a80e1f322d68207fc5e1117c3b5f5bd0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5425 2972 bytes
font_01_sfnt_off00005ea3.bin
1cd30f55339480d1318ee818f945cf209e0dd9f9a7dec2aff85d7e289cc50b86
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA3 12040 bytes