Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce6d439ec1ff80d6…

MALICIOUS

PDF

52.7 KB Created: 2020-05-13 23:48:00 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: cf3d26a16adcb56cea983e8650745838 SHA-1: 30b57abf669984a360acd2c5705b7ee2eaad6e92 SHA-256: ce6d439ec1ff80d6eb9eb1e1732f81c98daa0f1fd7e067a2374d826d00b0bcbf
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to numeric-based URLs on various domains, indicating a link farm or SEO poisoning tactic. The document body text is obfuscated but contains a URL that is also present in the heuristics, suggesting the primary purpose is to redirect users to malicious content hosted on these external sites. The ML classifier strongly flagged this PDF as malicious.

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://northernrailleaders.com/uploads/1/3/0/8/130814407/130814407.html#belz+mayn+shtetele+belz+sheet+music
    • http://thomasryan.co/uploads/1/3/1/3/131398214/9845297.pdf
    • http://oseelectricalservices.com/uploads/1/3/0/7/130738755/82de25f2c.pdf
    • http://novedadesdietradisson.com/uploads/1/3/0/6/130639616/5797312.pdf
    • http://homehealthmidwestcovenanthome.com/uploads/1/3/0/4/130490053/bamizapinagok.pdf
    • http://embodimentbykait.com/uploads/1/3/0/3/130323130/bareguwezotabesoxur.pdf
    • http://knowfallstrainingservices.com/uploads/1/3/0/2/130289749/nakapamojojo.pdf
    • http://sm-pipe.com/uploads/1/3/1/4/131483356/bobigajiw.pdf
    • http://agelessphotographs.com/uploads/1/3/0/7/130739376/2896912.pdf
    • http://stayluvedtransportation.com/uploads/1/3/0/6/130621744/2109297.pdf
    • http://sugarcubedcc.com/uploads/1/3/0/2/130274343/folizalig.pdf
    • http://phalanx-performance.com/uploads/1/3/0/7/130776138/piritijelup_fokutuziken.pdf
    • http://goodlifeacademy.ch/uploads/1/3/1/3/131381521/15b0b409e94cff.pdf
    • http://ptpifarms.com/uploads/1/3/0/5/130590545/d92730647d76a63.pdf
    • http://beasthoopsatx.com/uploads/1/3/0/5/130542982/rurubatazodufa.pdf
    • http://autoup2.com/uploads/1/3/0/4/130483520/pezata.pdf
    • http://caribbluecharters.com/uploads/1/3/0/7/130776824/dukumuwetabediliwimi.pdf
    • http://designsbydeszel.com/uploads/1/3/0/5/130551256/votuxavol.pdf
    • http://jeremygrant.ca/uploads/1/3/0/4/130435667/6f92b5fb.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_off00009823.bin
f31b11a3d6eeda5239d9c14553ff53c241dc1f30909253a4ed7b82bce5ebfdb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9823 14480 bytes

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