Malicious PDF — malware analysis report

Static analysis result for SHA-256 32b5c8e7acadbf05…

MALICIOUS

PDF

66.2 KB Created: 2021-01-09 19:18:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5028e8d37c2691e79cca2c011ed4dcdc SHA-1: 24ec516b9e6c368bbf9151371b56c250978539db SHA-256: 32b5c8e7acadbf056863ff552224e829ff7539a7ed5434143fff9ebdedb23065
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of many links suggests a phishing or content-redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9765

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ggtraff.ru/aws?utm_term=midas+m32r+service+manual
    • https://cdn-cms.f-static.net/uploads/4366047/normal_5f88a8ca8ea87.pdf
    • https://site-1175435.mozfiles.com/files/1175435/best_mini_dash_cam_uk.pdf
    • https://site-1171373.mozfiles.com/files/1171373/ticket_to_ride_europe_how_to_play.pdf
    • https://cdn-cms.f-static.net/uploads/4376856/normal_5fb5e041429a8.pdf
    • https://site-1178504.mozfiles.com/files/1178504/8527163953.pdf
    • https://site-1188059.mozfiles.com/files/1188059/womonubilekisozidow.pdf
    • https://site-1168066.mozfiles.com/files/1168066/koat_tv_7_breaking_news.pdf
    • https://site-1167988.mozfiles.com/files/1167988/66159931711.pdf
    • https://site-1196632.mozfiles.com/files/1196632/46456679181.pdf
    • https://cdn-cms.f-static.net/uploads/4469103/normal_5fbe1e06063f3.pdf
    • https://site-1180889.mozfiles.com/files/1180889/woxamoxegakowev.pdf
    • https://site-1084296.mozfiles.com/files/1084296/galaxy_shooter_2018_space_attack_cheats.pdf
    • https://static.s123-cdn-static.com/uploads/4376380/normal_5fc700ca52aab.pdf
    • https://cdn-cms.f-static.net/uploads/4375515/normal_5f8be848de0bd.pdf
    • https://cdn.sqhk.co/mosugukasiba/wcjfgeT/80022852322.pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0c7.bin
817e99f43c7185f6056f83957e818580b927b50204939f70900542710b0b0bb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C7 13804 bytes

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