Malicious PDF — malware analysis report

Static analysis result for SHA-256 98fe241255cb1529…

MALICIOUS

PDF

50.2 KB Created: 2020-03-22 03:31:13 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2b0db64af0c9812082a3f251d15deee2 SHA-1: c77984fd7cf04ef2c904272014a33d0a8000c20c SHA-256: 98fe241255cb1529eff78b97995a72ea123422de2a76e599c965bf5f1139378c
96 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. The document body contains text that appears to be a lure, referencing a book series and including metadata from the wkhtmltopdf tool. The primary attack pattern involves directing users to a network of suspicious URLs, likely to 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://skyefcameron.com/uploads/1/3/0/8/130874332/130874332.html#orden+de+los+libros+dela+saga+pideme+lo+que+quieras
    • http://geoffandwinnwright.com/uploads/1/3/0/3/130312983/riradere-fagegaluf-xikotegesi.pdf
    • http://www.hottropicsteeldrumband.com/uploads/1/3/0/3/130313454/joritugopoj_mevupir.pdf
    • http://drlupita.com/uploads/1/3/0/4/130483737/juzawofiwa.pdf
    • http://proridersaddlesllc.com/uploads/1/3/0/5/130590363/liwuxemuleji_vuvosebo_wifatilezekug.pdf
    • http://mta-sts.livingnativity.org/uploads/1/3/0/5/130539866/divujowiponevosasoku.pdf
    • http://portia-champagne.com/uploads/1/3/0/5/130588360/3973265.pdf
    • http://www.bringinghomebluecharity.org/uploads/1/3/0/3/130313271/2748146.pdf
    • http://fishedimpressions.net/uploads/1/3/0/5/130550683/492331.pdf
    • http://dynamicstrategicadvisory.com/uploads/1/3/0/6/130639959/xizutanulox.pdf
    • http://www.vivianscrown.com/uploads/1/3/0/5/130588961/4195988.pdf
    • http://completeapparel.net/uploads/1/3/0/5/130551739/jadawotugomozexe.pdf
    • http://ritabisson.net/uploads/1/3/0/7/130775853/tebesinegetuj.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000808c.bin
addc5ef23ac90419379325669d9fe27f6617922c6825ef3452bf8330193bb6fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x808C 10000 bytes
font_01_sfnt_off0000a352.bin
1d1fa5121415f8f5353993473374918b9d2a38f433752094af4cce5d3be72c8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA352 16312 bytes

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