Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9fccf97defb72cd…

MALICIOUS

PDF

72.8 KB Created: 2020-12-16 09:42:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01ff0f2b1b01033c5df4f63f859b2dca SHA-1: f38090a78d74f0553d15808f6e48c4bc3fb7e5df SHA-256: f9fccf97defb72cd221a9112d27e9655ece22741fd35d5ef747c7aa1f3b1e30b
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, with at least one identified as a malicious redirector. The heuristic firings indicate this is a link farm designed to direct users to potentially harmful sites. While no scripts were extracted, the presence of numerous external links suggests an attempt to lead the user away from the document to a malicious resource, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9885

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://gettraff.ru/strik?utm_term=best+goat+answers+fallout+3
    • https://buwulikifem.weebly.com/uploads/1/3/4/5/134583505/bolape.pdf
    • https://tipowunukal.weebly.com/uploads/1/3/4/3/134355136/7287527.pdf
    • https://misutinulil.weebly.com/uploads/1/3/1/4/131407711/8604940.pdf
    • https://betewobinolatid.weebly.com/uploads/1/3/4/7/134756009/mujavoxu-nuguli-vadixij.pdf
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/caa64.pdf
    • https://xisuviwilizej.weebly.com/uploads/1/3/4/3/134320176/144255.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://static1.squarespace.com/static/5fc1cdd0ec917750a3de3367/t/5fcc54f7e43f2b00a89dc9d8/1607226616197/crash_racers_figure_8_cars.pdf
    • https://s3.amazonaws.com/wapabefizosumi/jodevezajobopune.pdf
    • https://uploads.strikinglycdn.com/files/693fe54b-51a9-40a1-9d01-45a2b5e29d17/45655948912.pdf
    • https://uploads.strikinglycdn.com/files/f43fbef4-594e-49b9-be27-1cbb6e2bf7e0/travis_county_hot_check_warrant_search.pdf
    • https://uploads.strikinglycdn.com/files/28c0eac2-a358-4a40-8173-03a8b7170408/horror_thriller_movies_2006.pdf
    • https://uploads.strikinglycdn.com/files/41c590a7-c38f-4449-9748-beb7b1a4457a/little_giant_still_air_incubator_manual.pdf
    • https://static1.squarespace.com/static/5fc1b51b40f1034a5cae9388/t/5fc4272b9ee0f32b87d6edf5/1606690605638/ozark_camp_and_retreat_center_neosho_mo_64850.pdf
    • http://scripts.sil.org/OFL
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df50.bin
af443ce705348601f68b197baf710081a466f9d95fb60642de925ad7296036e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF50 3220 bytes
font_01_sfnt_off0000eac4.bin
bae54f7a70a1c08c59ee8bde58168480c8c0d318619882c2e98958a6ddcb86cf
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC4 5240 bytes
font_02_sfnt_off0000fcb3.bin
7b421024b5df3a5108a7d7a9d72c8f0d840718b413dcac5ebb75690c42440f66
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB3 5672 bytes