Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3ca8b88b6849ab2…

MALICIOUS

PDF

34.9 KB Created: 2020-04-16 07:23:18 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 8fb3f67598dde22c1947a33e6e90efe6 SHA-1: f3908ed529ed1de5e46a6ec8e9281e0b9a0a62f0 SHA-256: f3ca8b88b6849ab2ca9a30b9f4c2fe42cd2c3d0c55e0b2b77e83612cee825225
70 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO poisoning tactic. The document body, though heavily obfuscated, contains text related to 'Atf cleaner software free' and a call-to-action phrase, aligning with a lure to download potentially unwanted or malicious software. The presence of numerous unknown reputation URLs reinforces the malicious nature of the document.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://aventerreecole.com/uploads/1/3/1/6/131606169/131606169.html#atf+cleaner+software+free
    • http://intensifyyoursport.com/uploads/1/3/1/3/131380445/6065500.pdf
    • http://dtsdiary.com/uploads/1/3/0/6/130639765/53714.pdf
    • http://accuriteprograms.com/uploads/1/3/0/9/130969645/sekujitutaguweruj.pdf
    • http://vacantdetroit.com/uploads/1/3/0/7/130739934/cb6d07190de.pdf
    • http://msquarecincinnati.com/uploads/1/3/0/7/130776196/gapab.pdf
    • http://troop10fairfield.com/uploads/1/3/1/0/131070293/xikuzudegasotatuguda.pdf
    • http://995implant.com/uploads/1/3/0/6/130621926/5c7422.pdf
    • http://diebeziehungsshow.de/uploads/1/3/0/9/130969166/bd8fe833f9a.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_off000061dd.bin
78fcc128198c9ab4185f123cdfcedd3d4b6422c27f1efc2c2dc262f35b3f08e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61DD 8108 bytes

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