Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fd38156fb46df20…

MALICIOUS

PDF

45.3 KB Created: 2020-04-18 20:14:30 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 9fd65426d055c5df179eab1ff10214cd SHA-1: 4ba8d869a9145a18ce22729c946204e7e7a2b53e SHA-256: 9fd38156fb46df20ad9a07b38e41ba6682ee5d57a709c78020e62b049d33cdd5
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links to various domains, many of which appear to be SEO-optimized PDF hosting sites. The heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a link farm, suggesting a malicious redirection or content delivery scheme. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the extensive link farm points to a delivery mechanism for further malicious content.

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://onepricewash.com/uploads/1/3/0/6/130620154/130620154.html#ds1+pyromancy+guide
    • http://prettykurls.net/uploads/1/3/0/7/130740610/242875.pdf
    • http://martinez-family.us/uploads/1/3/0/5/130539659/kebimov.pdf
    • http://dmaconsulting.eu/uploads/1/3/1/3/131383621/xejubagevemonam-wutavur-raguvagow-wenuj.pdf
    • http://weddingsmountaincreeknj.com/uploads/1/3/0/7/130739087/gebikazusopazev.pdf
    • http://resonatetracker.net/uploads/1/3/0/7/130739239/toxekapopobez.pdf
    • http://andnowwhatsnext.com/uploads/1/3/1/4/131410538/vudixefusanu.pdf
    • http://cardiohealthcare.vip/uploads/1/3/0/4/130488891/retel_lebifov_gutikogaru_pebubigo.pdf
    • http://biometrixsystem.net/uploads/1/3/0/2/130270932/356226a0ac.pdf
    • http://haydeosgames.com/uploads/1/3/1/3/131380429/xufugij.pdf
    • http://salongbeautybox.se/uploads/1/3/1/0/131070197/7641839.pdf
    • http://transporteejecutivoyturistico.com/uploads/1/3/0/6/130621462/nexodanax.pdf
    • http://ap2s.info/uploads/1/3/1/4/131453603/62315257b7bd4.pdf
    • http://abouthound.com/uploads/1/3/0/5/130540897/95aca5eaeb.pdf
    • http://erinkchapin.com/uploads/1/3/1/3/131379040/f3cd8b3018.pdf
    • http://firepowerministries.net/uploads/1/3/1/4/131412426/05925b37fa6ac8f.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_off000088ac.bin
58adbca6fe1dcc636a55f501d2bdf2b6e366fee447e2448da4768052df2153c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88AC 8384 bytes

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