Malicious PDF — malware analysis report

Static analysis result for SHA-256 585316af2d8e0466…

MALICIOUS

PDF

38.4 KB Created: 2020-05-19 09:54:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ad9a3a95a6b922a45dfadbe4e8d71d7 SHA-1: 88ca5dbbeeafe3d88d2c187e82161b2981c016ba SHA-256: 585316af2d8e0466b6132c26403be0c2bc30a21d276b5a26c25ec66036bc8ca6
62 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to other PDF files hosted on similar domains. This behavior is indicative of a link farm or SEO poisoning tactic, designed to drive traffic to potentially malicious content. The document body, though partially corrupted, suggests a lure related to 'modal verbs of obligation exercises with answers'. No scripts were extracted from this sample.

Heuristics 3

  • 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
  • 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://rockandrowel.com/uploads/1/3/0/6/130639292/130639292.html#modal+verbs+of+obligation+exercises+with+answers
    • http://andrebretonracing.com/uploads/1/3/0/2/130272318/fitejex_vomufuw_folewi.pdf
    • http://thepremiumpost.com/uploads/1/3/0/6/130620778/2166933.pdf
    • http://cobeerleague.com/uploads/1/3/0/4/130483509/gaxewufuboluguta.pdf
    • http://ronsgrille.com/uploads/1/3/0/5/130589121/3825d3b5.pdf
    • http://spartanjupiter.com/uploads/1/3/1/6/131606556/nafose.pdf
    • http://environment-sos.org/uploads/1/3/0/9/130969004/5088372.pdf
    • http://slowve.org/uploads/1/3/0/2/130287738/zodokadun.pdf
    • http://erfashionbtq.net/uploads/1/3/0/4/130483337/forifow-rizoxonever.pdf
    • http://eastcoastriders.org/uploads/1/3/1/6/131606051/7854343.pdf
    • http://npeg.eu/uploads/1/3/0/6/130604127/xiwojudite.pdf
    • http://growmenetwork.com/uploads/1/3/0/5/130589114/zalakoworagonunus.pdf
    • http://thecutefoundation.com/uploads/1/3/1/4/131452988/2a03f.pdf
    • http://rickmyatt.com/uploads/1/3/0/8/130874113/df770c4c3233.pdf
    • http://juliusgibbs.com/uploads/1/3/0/9/130969449/691095fdea425f.pdf
    • http://micasabali.com/uploads/1/3/0/6/130604886/bfa76537d2.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_off000068ba.bin
3a896f7aa8bbe7c0233e406fa561b2a2c4a4617c376c9967518ef6672d6afb3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68BA 10808 bytes

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