Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e6e3e94da73b268…

MALICIOUS

PDF

36.9 KB Created: 2020-05-20 00:09:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: edc88703949a9e6707de25eacc3a6328 SHA-1: 40f05581cdf432516375d5ae34e951252a6abf9f SHA-256: 4e6e3e94da73b2688dbbce3c4561d9cdeb4faf3e70e65ed0a5970e6a73202ebb
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to PDF files hosted on various domains, suggesting a link farm or redirection scheme. The document body and extracted URLs indicate a lure for 'Emilyivy video download', likely a social engineering tactic to trick users into clicking malicious links. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://xpressphotobooth.net/uploads/1/3/0/2/130274028/130274028.html#emilyivy+video+download
    • http://averagestories.net/uploads/1/3/1/3/131384611/guribeg.pdf
    • http://marymoorejazz.com/uploads/1/3/1/4/131409616/wonam-siberavepidotes-jawab.pdf
    • http://redixcheats.net/uploads/1/3/1/8/131856815/pizarewawumojilurir.pdf
    • http://glbahorse.com/uploads/1/3/1/0/131070539/538d4d405f.pdf
    • http://argovia-ducks.net/uploads/1/3/1/6/131606128/1613803.pdf
    • http://617567757374656e.com/uploads/1/3/0/2/130270873/vagoxir.pdf
    • http://epiccenterchs.com/uploads/1/3/0/5/130551116/kinifebupetepalijado.pdf
    • http://alexaproductions.com/uploads/1/3/0/7/130776646/tupin-gixevejalugew.pdf
    • http://greatnessfororaganizing.com/uploads/1/3/1/4/131408224/jinex-kokoxududuzapon-zegese.pdf
    • http://eciprocessing.com/uploads/1/3/0/7/130775627/7197914.pdf
    • http://utahlandscapingsaltlakecity.com/uploads/1/3/0/8/130873804/wowuzisowufizalifo.pdf
    • http://mellymeyer.com/uploads/1/3/1/1/131164021/zotedesiwufepuvub.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_off000067bf.bin
43dcf490917862a23348d5f076463d7ac7cbf274626922a658afcb962b4fbf0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67BF 9708 bytes

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