Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ebf121eafc65a85…

MALICIOUS

PDF

67.6 KB Created: 2021-01-14 23:43:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10376b1dd08b818326b5605b25a97bba SHA-1: fed84153a9d439e56b0d15b4e8c00a5fd737f755 SHA-256: 5ebf121eafc65a8584bdcf5b4224e61aaaf46237ac5699ba36040dfd206cec90
184 Risk Score

Malware Insights

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

This PDF file functions as a link farm, directing users to numerous external websites, many of which are hosted on disposable domains. The embedded URLs, such as 'https://trafffe.ru/aws?utm_term=kaabil+full+movie++720p+movies+counter', suggest a lure related to movie downloads, likely intended to facilitate phishing or malware distribution. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8937

Heuristics 5

  • 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
  • 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.
  • 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 https://trafffe.ru/aws?utm_term=kaabil+full+movie++720p+movies+counter
    • https://rifodomofakape.weebly.com/uploads/1/3/4/6/134627700/gakuviso-bebokovutiga-pajilarogej.pdf
    • https://bobujiwa.weebly.com/uploads/1/3/1/0/131070874/kesik.pdf
    • https://site-1167971.mozfiles.com/files/1167971/flip_tumbling_hack_apk.pdf
    • https://xavuzilutose.weebly.com/uploads/1/3/1/0/131070872/xupenobujiluri-sitagoximapenaf-xagek.pdf
    • https://vosovijuz.weebly.com/uploads/1/3/0/8/130813614/86fd17.pdf
    • https://texolobalow.weebly.com/uploads/1/3/4/5/134597330/sedowenajikef.pdf
    • https://site-1246757.mozfiles.com/files/1246757/angular_form_disable.pdf
    • https://tivenudonokokom.weebly.com/uploads/1/3/0/9/130969369/30927d1d8be.pdf
    • https://site-1229162.mozfiles.com/files/1229162/diethyl_ether_material_safety_data_sheet.pdf
    • https://povurumupun.weebly.com/uploads/1/3/4/8/134884194/421734.pdf
    • https://xedutorapul.weebly.com/uploads/1/3/0/8/130813372/dinixulide_gososaje_jipolobikeguni.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jifedefujodu/janoxinimuxetuj.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de36.bin
59604458087550dabbf7f3561ac3bdcd5efd08c4630c9fb70d84cd08d2cd2436
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE36 2952 bytes
font_01_sfnt_off0000e8c1.bin
b2b455fe096a322b6734fca31789eb24c54e2acac9396214fc35a6bb9d28eee0
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C1 5684 bytes