Malicious PDF — malware analysis report

Static analysis result for SHA-256 c96c64655e872511…

MALICIOUS

PDF

65.5 KB Created: 2020-06-22 06:10:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6704d042409411f4074191419eeb73c SHA-1: 587d2321b0875b3911d28192763ae4e1c9518452 SHA-256: c96c64655e87251189941997be6e222dfc621c6d29d83fcd20e8bc968e6e7689
92 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which are hosted on domains that appear to be part of a link farm. The document body, though partially corrupted, suggests a lure related to 'Post office saving bank manual'. The ML classifier strongly indicated maliciousness. The primary attack pattern involves redirecting users to a network of potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://plasterplug.com/uploads/1/3/0/5/130552097/130552097.html#post+office+saving+bank+manual
    • http://wadesflightinstruction.com/uploads/1/3/1/3/131379266/jamoxumujapuge.pdf
    • http://lynscakes.net/uploads/1/3/0/3/130323517/livatanomita.pdf
    • http://fixmefancy.com/uploads/1/3/0/3/130323957/kisulalidixa-fuwuluxotiwosi-muwuka-pubipiwijape.pdf
    • http://kelseyleon.org/uploads/1/3/0/7/130739039/kavanesolifubuwixa.pdf
    • http://cateringservicessc.com/uploads/1/3/0/7/130775850/duvutoraferi.pdf
    • http://curtisperformancehorses.com/uploads/1/3/1/4/131406390/8945307.pdf
    • http://thecorpseandrat.com/uploads/1/3/1/4/131483371/mijobopopajefiro.pdf
    • http://eurogommepisano.com/uploads/1/3/0/7/130740209/8a932af.pdf
    • http://freeheartclinic.com/uploads/1/3/1/4/131438416/wabup.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009ec2.bin
cc724c69002b9f1c6da3edbb13b559a32817388f6b0bc1feabc32e58fb7b7a59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EC2 5252 bytes
font_01_sfnt_off0000b09a.bin
d87989b3fd1699a8af2f6c6fb461ae5c09b766e8bc2a07e9eadcf7c76439b96f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB09A 11856 bytes
font_02_sfnt_off0000d928.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD928 16164 bytes
font_03_sfnt_off0000ee79.bin
d619a6d7189084cda707cf6208931e588ec66be2161280175a38d11a6121f426		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE79 2908 bytes

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