Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dde2d69818ee903…

MALICIOUS

PDF

34.2 KB Created: 2020-06-17 00:41:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60654d6bf97884f54225473c223c83d5 SHA-1: 7f6fdc616cb81a6f657739804e7eebc3c76a64bb SHA-256: 7dde2d69818ee903e8928f66f37af3b5e80924db0eb483bcfbab568d1146bba7
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to similarly structured URLs on different domains. This pattern is indicative of a link farm, often used for SEO manipulation or to distribute malicious content. The primary heuristic identified a link farm with 10 external PDF links, and another heuristic noted an external URI pointing to benzunhinged.net. The document body contains garbled text but includes the URL http://benzunhinged.net/uploads/1/3/1/3/131384136/131384136.html#autodesk+maya+user+guide, suggesting a potential lure related to software documentation.

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://benzunhinged.net/uploads/1/3/1/3/131384136/131384136.html#autodesk+maya+user+guide
    • http://greenlandhealthcare.com/uploads/1/3/0/4/130488243/ridorepatefe-varazutesuf.pdf
    • http://cgscaffolding.com/uploads/1/3/1/3/131398525/sinilaxezu_tolagakowupesa.pdf
    • http://mintconstruction.org/uploads/1/3/0/2/130289448/3645844.pdf
    • http://hostmaster.leeandlaus.com/uploads/1/3/0/6/130620302/pamipidepobajivobu.pdf
    • http://bennettandsonconstruction.com/uploads/1/3/1/8/131856389/4681167.pdf
    • http://icarustours.com/uploads/1/3/0/9/130969790/04ca6326.pdf
    • http://mta-sts.mail.bornraw.net/uploads/1/3/0/7/130776105/dotavaxijarekizepono.pdf
    • http://beltavolo.com/uploads/1/3/1/6/131636987/5555079.pdf
    • http://thisoklahome.com/uploads/1/3/0/4/130491599/495807.pdf
    • http://valleybikecommute.com/uploads/1/3/0/5/130539659/besozivun_zezofetutev_pamupitopoz_fuvepagiw.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_off00004c8c.bin
bceaf675396c9eaffce783f7e5edeb2ed30967939c5b46a822b3117a63dc4e21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C8C 5044 bytes
font_01_sfnt_off00005dbc.bin
8dba1001499c577df85b9f552bdadb1ba0f6773e995d3aa430e0d14e1e8bd192		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DBC 9000 bytes

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