Malicious PDF — malware analysis report

Static analysis result for SHA-256 7830cbdd3769cc1e…

MALICIOUS

PDF

79.6 KB Created: 2020-04-09 22:17:43 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1336f75bdfaf2e260c7f503c297adb4e SHA-1: 34c7609f775b22084bcdb82ffb20a0b729e60dde SHA-256: 7830cbdd3769cc1e09979ce9f5c59bb35ce375c4d48479bc141afebf438edbe4
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file exhibits characteristics of a link farm, with numerous external URLs embedded within its structure. The heuristic 'PDF_SEO_LINK_FARM' specifically indicates a large number of external PDF links, suggesting a malicious intent to redirect users or manipulate search engine results. The ML classifier also strongly flagged this PDF as malicious. While no scripts were directly extracted, the presence of many external links points towards a phishing or malicious redirection attack vector.

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://theovercomersblueprint.com/uploads/1/3/0/4/130435753/130435753.html#can+i+download+nexus+mods+to+xbox+on
    • http://fotografienelemispelon.com/uploads/1/3/1/4/131437604/doziwukitipijejo.pdf
    • http://baxtermagnus.com/uploads/1/3/0/9/130969647/wuvegigu.pdf
    • http://nativesnectar.com/uploads/1/3/1/4/131406893/c0680.pdf
    • http://congsupport.org/uploads/1/3/1/4/131438241/fuxomegusakodolive.pdf
    • http://gigagrass.com/uploads/1/3/0/6/130621187/rizutokokid_kevunuwaporu_berufejopud_mizaremitefekem.pdf
    • http://smarturbanobservatory.org/uploads/1/3/1/4/131406741/e988aaf323e0e3.pdf
    • http://eppswelding.com/uploads/1/3/1/4/131407102/fobitapuseri.pdf
    • http://koiinteriors.net/uploads/1/3/1/4/131454270/joraxobugikasit.pdf
    • http://bloomonkeyvapesllc.com/uploads/1/3/0/7/130775164/savog.pdf
    • http://katesindiantrail.com/uploads/1/3/0/6/130620551/dosagibilunetomateg.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_off00010fe2.bin
e921078e1cd890e29c6186e903013b0258f681641df752892f093b4eced40642		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE2 8740 bytes

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