Malicious PDF — malware analysis report

Static analysis result for SHA-256 606ebc59d83efec6…

MALICIOUS

PDF

45.5 KB Created: 2020-03-23 17:21:05 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: fed35ffe2d718204e4e2dfe4482cfc6a SHA-1: 096587315f84cc0f091e4a8982722540fe2b9502 SHA-256: 606ebc59d83efec60b2aafa3c39f2b9befc4edac8e7b6aaeb83a999fb2482db2
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains a title related to woodworking and the wkhtmltopdf application, suggesting a potential lure. The primary function appears to be directing users to a network of linked websites, which could 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://melancholymail.com/uploads/1/3/0/7/130776611/130776611.html#como+hacer+una+mesa+redonda+de+madera+para+comedor
    • http://southernstatescontracting.com/uploads/1/3/0/7/130775883/xoxonoxoma_vixodukemas_jowijeme.pdf
    • http://goactivegourmet.com/uploads/1/3/0/8/130813835/c862b9e460.pdf
    • http://hostmaster.sandalsdoggiestuff.com/uploads/1/3/0/4/130477252/bizakuke_duxonof.pdf
    • http://www.jennifermagnano.com/uploads/1/3/0/6/130621233/7291265.pdf
    • http://dohmaamericansamoa.org/uploads/1/3/0/5/130543070/8297792.pdf
    • http://simplyecopure.com/uploads/1/3/0/5/130588845/voloxizipu_nibikej.pdf
    • http://akkijyrkka.com/uploads/1/3/0/8/130814591/vipixiruzidufow.pdf
    • http://100places.de/uploads/1/3/0/6/130604517/1c15ee1a8.pdf
    • http://youthmediatraining.com/uploads/1/3/0/6/130622033/rinobofedokafodoje.pdf
    • http://bethelatchristmas.com/uploads/1/3/0/2/130287946/5f3d8453310e6c.pdf
    • http://osakahoumausa.com/uploads/1/3/0/7/130740257/pesozitimera_wakubo_zomofuvubafage_girewisilapelid.pdf
    • http://www.hemettaxpayers.org/uploads/1/3/0/6/130620163/todevef-vapez-xibidaridud-luwodar.pdf
    • http://consplayers.com/uploads/1/3/0/3/130324072/badebiriwupafub.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_off00008508.bin
edb4e186f12f9e7cc79a48a1eb811d6a53e2cb6c21323238a6f96138d03cfaec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8508 9460 bytes

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