Malicious PDF — malware analysis report

Static analysis result for SHA-256 34661826d179ccd8…

MALICIOUS

PDF

44.0 KB Created: 2020-04-11 13:28:38 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 01c18a684b6728bdbb6af948837dbd90 SHA-1: a30817669e0f0effa7c9a9dbcfa898714769811d SHA-256: 34661826d179ccd83945af4fc08794be896b6a6dd727db7d6765ccc61bfbf139
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, many of which point to other PDF files hosted on similar domains. This pattern is indicative of a link farm or SEO poisoning technique designed to attract users searching for specific content, such as 'How to solve it george polya pdf'. The primary link identified, http://rongzhao.life/uploads/1/3/1/6/131606368/131606368.html#how+to+solve+it+george+polya+pdf, likely serves as a lure to a malicious site. No scripts were extracted, and the document body was heavily obfuscated, but the heuristic firings strongly suggest a malicious intent to redirect users.

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://rongzhao.life/uploads/1/3/1/6/131606368/131606368.html#how+to+solve+it+george+polya+pdf
    • http://loveisthecolourred.com/uploads/1/3/0/8/130874205/f779916e.pdf
    • http://kristinapageartwork.com/uploads/1/3/0/7/130740209/tetenusiwejimub.pdf
    • http://democracytodayma.org/uploads/1/3/0/5/130539438/tudaliguwovifam.pdf
    • http://macehualli.org/uploads/1/3/0/5/130539678/653219.pdf
    • http://lindarinehart.com/uploads/1/3/1/4/131482866/3945373.pdf
    • http://nora-davis.net/uploads/1/3/0/2/130287229/bebopegokuxuguw-sofaroveluvi-basolizipama.pdf
    • http://muskegonapostolic.net/uploads/1/3/1/4/131453832/dokuzutudigi_wabofumoke_lewojajafexukaw.pdf
    • http://livenm.net/uploads/1/3/0/4/130490036/zogamuwaleruxonorano.pdf
    • http://jamiesellsstuffdomain.com/uploads/1/3/0/5/130539757/121966.pdf
    • http://keithpettus.com/uploads/1/3/0/7/130739661/nojolu-kigubenenome-siditetepiko.pdf
    • http://joeyvijayam.com/uploads/1/3/0/6/130620340/pomebifamadufunixupi.pdf
    • http://riceballnyc.com/uploads/1/3/0/9/130969659/5283470.pdf
    • http://hubleyshandymanservice.com/uploads/1/3/0/8/130813095/wipipuxewemus_lijezof.pdf
    • http://wagsforkids.com/uploads/1/3/0/6/130604125/7ab99c5b.pdf
    • http://lindarinehart.com/uploads/1/3/1/4/131482866/3945373
    • 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_off000081e3.bin
2c6b7d8e2909216f17a1bd581f090ed46c1b5f71133144e2480b4f09d85e820e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81E3 8452 bytes

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