Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e22926cb3684986…

MALICIOUS

PDF

90.9 KB Created: 2020-04-12 05:50:03 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d6d0e1ede1f60e9d571b2efec9332f54 SHA-1: 848362e066475e4c6f37d1c5c0236f54dc1ef156 SHA-256: 8e22926cb36849860c631a1a803acb1049394b65f0baeeb63d31d94d6e73f267
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO spam operation. The document body, though partially corrupted, contains text related to 'Iconografia el significado de la obra' and mentions wkhtmltopdf, indicating it was likely generated to appear as a document. The primary intent appears to be driving traffic to a network of websites, as evidenced by the high number of external URLs extracted.

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://brushpopperaviation.com/uploads/1/3/1/4/131437172/131437172.html#iconografia+el+significado+de+la+obra
    • http://jaypeaklawsuit.com/uploads/1/3/0/8/130813639/lonefukega.pdf
    • http://maritatsea.nl/uploads/1/3/0/3/130313525/kulupu_nizebitigozuf_kevipiw_dejunisurumajer.pdf
    • http://lillgallery.com/uploads/1/3/0/9/130969599/sunituloteguto.pdf
    • http://milkers-gloves.com/uploads/1/3/0/5/130588687/jazuzarus.pdf
    • http://balthazarcafebar.com/uploads/1/3/0/3/130323157/tifuf_sixojizoti_momemakipaz_xupurovo.pdf
    • http://dallasairductcleaning.net/uploads/1/3/0/2/130272353/3622302.pdf
    • http://phase3technology.com/uploads/1/3/1/0/131070904/jizotone.pdf
    • http://simplifyingcellphonestartup.com/uploads/1/3/1/3/131382387/8715963.pdf
    • http://alltogetherserviceaide.com/uploads/1/3/0/2/130270804/2972731.pdf
    • http://grandbahamasoupkitchen.org/uploads/1/3/1/4/131453087/xezidis.pdf
    • http://biggzhaircare.com/uploads/1/3/0/6/130620198/furipikebij-nawazim-kefuw-remudoxajepuso.pdf
    • http://unitedpolitics.net/uploads/1/3/1/3/131383583/bubakina.pdf
    • http://cryptopalz.com/uploads/1/3/0/6/130604069/figagipo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000113cc.bin
2e8d2d7c59d136239aafecd00291f91354de2ed77614d11556bd2c7a32abe575
pdf-font-stream PDF embedded font (sfnt) at offset 0x113CC 11388 bytes
font_01_sfnt_off00013906.bin
fb7096e5d3f59422a8d748c70116e859595d2b4fdfc48d53ccb4900b42777788
pdf-font-stream PDF embedded font (sfnt) at offset 0x13906 4944 bytes
font_02_sfnt_off000148ea.bin
370ea7091e239aa15f4fb7bdc5e6497b385c6ef7defd8d1a60588151178dc1b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x148EA 16120 bytes