Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb06080e0a2aa279…

MALICIOUS

PDF

38.4 KB Created: 2020-03-28 10:17:58 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f1ae2531ec69f9f1e2052fd11c897974 SHA-1: edfa7dc929a6b3259b7f602f4a41636d97414c4e SHA-256: bb06080e0a2aa279da245af8844ddc8df37aa6aaba6bd5c44ed96ecb59731f09
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, as detected by the PDF_SEO_LINK_FARM heuristic. The embedded document body text, though partially corrupted, includes a URL that points to a PDF file. This suggests the primary function of this document is to act as a lure, directing users to a network of linked PDF files hosted across multiple domains, likely for SEO spam or to distribute further malicious content.

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://uibffworld.org/uploads/1/3/0/9/130969722/130969722.html#cuales+son+los+multiplos+comunes+de+216
    • http://mobilizeonline.com/uploads/1/3/0/6/130620997/9923763.pdf
    • http://www.cliftonmcfate.com/uploads/1/3/0/6/130604599/vomevat.pdf
    • http://tiptrackerapp.com/uploads/1/3/0/5/130539457/zuzoriful.pdf
    • http://leadingrecords.com/uploads/1/3/0/9/130969862/48b1118f8fe07.pdf
    • http://michaelshusko.com/uploads/1/3/0/6/130605521/zunixumepuf.pdf
    • http://www.cpt-serviced.co.uk/uploads/1/3/0/4/130435571/80822fa936b8.pdf
    • http://rockofoakland.com/uploads/1/3/0/2/130270747/1309727.pdf
    • http://rustyfierce.com/uploads/1/3/0/6/130639746/44e7fea20.pdf
    • http://nativelabjp.com/uploads/1/3/0/4/130483514/7435585.pdf
    • http://cannablisconsulting.com/uploads/1/3/0/4/130488884/jolawezomiko.pdf
    • http://albertapreventative.com/uploads/1/3/0/7/130776688/b05b14f6e948ba.pdf
    • http://maelasesethics.com/uploads/1/3/0/6/130603889/degomojasegovajakamu.pdf
    • http://www.stnicholassundayschool.com/uploads/1/3/0/9/130969488/2551757.pdf
    • http://infosoldier.com/uploads/1/3/0/7/130775023/sufefaje.pdf
    • http://motassist.com/uploads/1/3/0/4/130436307/xuziruletu_boxufozogamosan_kadoguzo_dewixezomalo.pdf
    • http://7quaildrive.com/uploads/1/3/0/5/130588237/vazalabagudabale.pdf
    • http://talbotkids.net/uploads/1/3/0/2/130287845/firewifimewoledezi.pdf
    • http://grossmanfamily.org/uploads/1/3/0/7/130738951/29b5c31.pdf
    • http://eatthinkwin.com/uploads/1/3/1/1/131164519/zugijawudas.pdf
    • http://miamiflpressurewashing.com/uploads/1/3/0/3/130379172/2242616.pdf
    • http://realii.org/uploads/1/3/0/9/130969166/fd840ab.pdf
    • http://www.kitchentabletunes.com/uploads/1/3/0/2/130272862/4040119.pdf
    • http://www.freetaxslayerpro.com/uploads/1/3/0/5/130551051/valegudovevekos.pdf
    • http://aehmartistry.com/uploads/1/3/0/2/130291769/deganafijefax.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_off00006ea9.bin
41f321ad7c595a27577143716a63404b71da7a942de0059cdc3d111a9940a011		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA9 7340 bytes

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