Malicious PDF — malware analysis report

Static analysis result for SHA-256 8231a7a963cf2afe…

MALICIOUS

PDF

36.7 KB Created: 2020-04-21 22:01:22 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 8655066140fc9fde3db2629364533744 SHA-1: 595449b988a87c35782718a171c56f3b8f1ceea4 SHA-256: 8231a7a963cf2afef6a12fddf2d9b1551edd695aefa2b8ec5f64b3605a716326
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files on different domains. This pattern is indicative of a link farm designed to manipulate search engine results or to distribute malicious content. The document body, though partially corrupted, contains references to 'Lineage 2 high five storm screamer guide' and 'wkhtmltopdf', suggesting a lure or a method of generation for the PDF. No scripts were extracted, and the primary malicious activity observed is the distribution of links.

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://agtco.net/uploads/1/3/0/6/130639521/130639521.html#lineage+2+high+five+storm+screamer+guide
    • http://overheardoptometry.com/uploads/1/3/0/7/130776100/mokale-luzaz.pdf
    • http://anadarkobasinllc.com/uploads/1/3/1/4/131409884/364278d9b7ae1.pdf
    • http://waveapparat.com/uploads/1/3/0/2/130271019/rosewogif_sakelodafo.pdf
    • http://rosavoice.com/uploads/1/3/1/3/131380065/13e41d245.pdf
    • http://bsmithcontracting.com/uploads/1/3/1/0/131070144/ccdb71.pdf
    • http://adamscleanin.com/uploads/1/3/1/1/131164315/bosipowavopobu.pdf
    • http://armadalecofc.com/uploads/1/3/1/3/131384255/loragat_tofixunisuvin_kopatoka.pdf
    • http://jesskaphotography.com/uploads/1/3/0/5/130538990/dozizab-sidavokipa-fobuxadumilelit-kivoxorupi.pdf
    • http://flamenfires.com/uploads/1/3/0/8/130813834/3d5076e06c9ea.pdf
    • http://staywiththepain.com/uploads/1/3/0/7/130776325/9663931.pdf
    • http://mail.cultivateyoga.com/uploads/1/3/0/7/130776885/2689802.pdf
    • http://kandykoated.net/uploads/1/3/0/6/130620456/986cc1339d507c.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_off00006638.bin
fb1ad0428822b321fed02baac5659ade21eb0aea698fe812a027609e2ddf4bb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6638 8856 bytes

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