Malicious PDF — malware analysis report

Static analysis result for SHA-256 a30e59b57c5bef46…

MALICIOUS

PDF

42.7 KB Created: 2020-04-02 04:37:46 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: fd7a1079857febfe74995d272160f54e SHA-1: 4464b05286d85b44c78f3daa9dd9d931be9cdd04 SHA-256: a30e59b57c5bef4691310d28f31fca6fcf6acea1b3c8c2dfc2d1279fbfb2ec9b
94 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, many of which point to other PDF files on different domains. This behavior is indicative of a link farm or SEO poisoning attack, designed to drive traffic to potentially malicious sites or to distribute malware. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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://wellwithacupuncture.com/uploads/1/3/0/2/130274316/130274316.html#imperialism+and+world+war+1+vocab+worksheet
    • http://davidjandejsek.com/uploads/1/3/0/2/130270761/jizajunarisuz.pdf
    • http://jllcapitalmarketsregionstower.com/uploads/1/3/0/3/130323573/toxevifiw-xizejevex-fefijel.pdf
    • http://savitrifeedyourradiance.com/uploads/1/3/1/4/131437333/8405617.pdf
    • http://andrewleddy.com/uploads/1/3/1/4/131453657/zexibe.pdf
    • http://2016toyotalandcruiser.com/uploads/1/3/0/4/130476307/1810386.pdf
    • http://movimientomexicano2018.org/uploads/1/3/0/5/130588494/4287126.pdf
    • http://earthenvisions.net/uploads/1/3/0/7/130740412/7756689.pdf
    • http://pomegranateprogramming.com/uploads/1/3/0/3/130323743/deponabab-mularoba.pdf
    • http://orange-spotlight.com/uploads/1/3/1/0/131071127/715185.pdf
    • http://atcostcaskets.com/uploads/1/3/0/4/130476697/9509184.pdf
    • http://caprateig.com/uploads/1/3/0/4/130483273/meposak.pdf
    • http://djhotwatts.com/uploads/1/3/0/6/130604552/tireto.pdf
    • http://beatrice77livestocksales.com/uploads/1/3/0/3/130379094/kelimu-zudute-bagivezalinale-panirux.pdf
    • http://cismeralco.com/uploads/1/3/0/4/130483980/novesonofudoka.pdf
    • http://organisationalinterventions.org/uploads/1/3/0/6/130603891/8389464.pdf
    • http://naildbyfaith.com/uploads/1/3/0/2/130288502/52c6fc73c92.pdf
    • http://sorinoakreview.org/uploads/1/3/0/6/130621203/kufozupena-rewikosi.pdf
    • http://herstoryhistruth.com/uploads/1/3/0/6/130620618/4999956.pdf
    • http://ophirfashions.com/uploads/1/3/0/6/130605403/bojew.pdf
    • http://randomfrankshots.com/uploads/1/3/0/4/130489398/kolizuluvo_tesowajin.pdf
    • http://smartmobilityinc.com/uploads/1/3/0/6/130639285/xejezo.pdf
    • http://friendsofjoetrillo.com/uploads/1/3/0/7/130739492/zivolopav_nugoxumuz_timewavapibopep.pdf
    • http://aldreaalien.com/uploads/1/3/0/4/130483647/kofav_nutiwepu_tajifobuvamuguz_ruxizab.pdf
    • http://aldreaalien.com/uploads/1/3/0/4/130483647/kofav_nutiwepu_tajifobuvamuguz_ruxi
    • 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_off00007fc1.bin
6962209fe6196d052c6ff052d66cd61565360f3ea044c02815c94ac502ec203c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FC1 7436 bytes

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