Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e8ff0ddb8e6adc0…

MALICIOUS

PDF

40.6 KB Created: 2020-06-07 09:43:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0c62b541d442cf49e0375bf9f3a4384 SHA-1: 5c7b5273f49b63a2250acfce79487438669235f8 SHA-256: 9e8ff0ddb8e6adc06d18fa36e33ab3f77215fa5454d1869ffc065a591262d02e
92 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, as detected by the PDF_SEO_LINK_FARM heuristic. The primary purpose appears to be directing users to a vast collection of other PDF documents hosted across numerous domains. This is likely a tactic to inflate search engine rankings or distribute malicious content indirectly. No scripts were extracted from this sample, and the document body text is heavily obfuscated.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://74-123-79-230.mgwnet.com/uploads/1/3/0/2/130291786/130291786.html#zankyou+n%25C3%25A3o+terror+ost+13
    • http://jollyfootsg.com/uploads/1/3/0/5/130589182/napadataf-robilanob.pdf
    • http://mta-sts.mx.mtstv.org/uploads/1/3/1/3/131380181/c21f6e0cc.pdf
    • http://kmotionkoncepts.com/uploads/1/3/0/6/130603873/robedus.pdf
    • http://wildcreekboutique.com/uploads/1/3/1/4/131437640/fixosotat.pdf
    • http://greentexasbuilders.com/uploads/1/3/0/2/130291040/ruzagijupepivobuxun.pdf
    • http://jadescapeshunfu.net/uploads/1/3/0/6/130604633/f83c3081.pdf
    • http://asphaltconcretesealcoating.com/uploads/1/3/0/5/130543552/bbd503.pdf
    • http://itsybitsybabygiftmarket.com/uploads/1/3/1/3/131378820/degad.pdf
    • http://rcboutiquellc.com/uploads/1/3/1/6/131637037/timil_kowixeza_sipubabexuriz.pdf
    • http://richoutcomes.com/uploads/1/3/0/4/130488694/7152836.pdf
    • https://kiligirili.files.wordpress.com/2020/06/felozawezimidi.pdf
    • https://rojejimij901227669.files.wordpress.com/2020/06/2912628324.pdf
    • https://libajetukani.files.wordpress.com/2020/06/78525782997.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_off00005a87.bin
cc4ca12def08991913cc4b1dc64e8e483a66e1045fabb7b520b7bf9a2b954f29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A87 6156 bytes
font_01_sfnt_off00006fc7.bin
952e9ed47923e6b2ea799022c641ce6899d1f23ee8d6a806a93a5339bd10072d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC7 12840 bytes

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