Malicious PDF — malware analysis report

Static analysis result for SHA-256 23ad8d3705258822…

MALICIOUS

PDF

55.6 KB Created: 2020-04-01 13:08:11 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a44a994a38ab7a05c0a9be2a121bf8e1 SHA-1: e87d7ce06f81000c0779934fa110152cb757e1e6 SHA-256: 23ad8d3705258822bb6bacf0c8fdb1b042e96165b92b930cabfb3a9c4f335733
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 indicated by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or a distribution mechanism for further malicious content. No scripts were extracted from this sample, and the document body was heavily obfuscated, limiting direct analysis of user-facing lures.

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://loscalifornianos.info/uploads/1/3/1/0/131070588/131070588.html#captive+prince+fanart+tumblr
    • http://jacobecservices.com/uploads/1/3/0/6/130621740/bofukofi.pdf
    • http://geekygreengirl.com/uploads/1/3/1/0/131071167/wiwofakiweduvifazok.pdf
    • http://cookietyme.com/uploads/1/3/0/6/130604319/daraliravokajave.pdf
    • http://btlanglandscape.com/uploads/1/3/0/6/130605351/2721275.pdf
    • http://prabhjotsinghlall.com/uploads/1/3/0/5/130588286/e45e1995015.pdf
    • http://iqasllc.com/uploads/1/3/0/5/130589427/jezinoxek_rajux.pdf
    • http://science2u.com/uploads/1/3/0/4/130476649/misuwejunikibeje.pdf
    • http://newtneuronsinaction.com/uploads/1/3/0/5/130539654/cc5599b.pdf
    • http://reisteel.net/uploads/1/3/0/5/130590138/6512953.pdf
    • http://kaleidoscopeparenting.com/uploads/1/3/0/3/130313484/3131462.pdf
    • http://filipiakconsulting.com/uploads/1/3/1/4/131438500/bijigigami-nijumokidapa.pdf
    • http://second-childhood.com/uploads/1/3/0/7/130775294/zipuguwixevev.pdf
    • http://teintecalfeutragemikiwam.com/uploads/1/3/0/5/130543038/2158017.pdf
    • http://nomadic-chris.com/uploads/1/3/1/4/131453544/mifelusanibexedal.pdf
    • http://142ellert.com/uploads/1/3/1/0/131070767/5785048.pdf
    • http://dawnsandahl.com/uploads/1/3/1/0/131069744/2702.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_off000078d0.bin
97a4800e82a621621c3a3d52bcd048c1fd9ddc4681a97b03c2500e766bbee603		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78D0 7452 bytes
font_01_sfnt_off00008c25.bin
5129f9525910a92bb2e223e77ac46160ba4bca4467dd33ce2dbc8577f6136bc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C25 8068 bytes
font_02_sfnt_off0000ab4b.bin
e1b6949e97654930295b637b7256016d0b3d95e6f49365ef906213aa0c864287		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB4B 2740 bytes
font_03_sfnt_off0000b70c.bin
87b399a0095802efbb5f9f059860ac7f7f568034e7c6b814f2270141720de63d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB70C 16732 bytes

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