Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e5db638d41b1d6b…

MALICIOUS

PDF

66.9 KB Created: 2020-12-22 15:21:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d6ac8ff23d1e066bc62abf8fccc0a74 SHA-1: 774fe7286907647cccf59398a0c93f79b8159ba2 SHA-256: 2e5db638d41b1d6b694ec582682d91052925f50e7187de1671c6eb6f93dc9c4d
156 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to 'trafficel.ru' with a query parameter suggesting a lure related to Gmail app passwords. This URL leads to another PDF hosted on AWS S3, indicating a potential phishing or credential harvesting campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://trafficel.ru/strik?utm_term=gmail+app+password
    • https://farazekij.weebly.com/uploads/1/3/4/3/134379469/ketelonizolef_gosofar_tejaredatub.pdf
    • https://zasuzepomuban.weebly.com/uploads/1/3/4/6/134627511/kifamufine.pdf
    • https://jowodetuleguzu.weebly.com/uploads/1/3/1/8/131856173/lodegupedumitaro.pdf
    • https://rowofijiguni.weebly.com/uploads/1/3/4/4/134479741/792e8a7.pdf
    • https://ripumunilemaz.weebly.com/uploads/1/3/5/3/135302863/nupejasefawokox_fuvekabawulu.pdf
    • https://jakinamil.weebly.com/uploads/1/3/4/3/134391996/nurafowub.pdf
    • https://fufivivol.weebly.com/uploads/1/3/0/8/130873849/4741482.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rijaliwiguvex/31837422364.pdf
    • https://uploads.strikinglycdn.com/files/9f97aade-c43e-453f-b263-4a7cf743136b/princes_of_the_universe_tab.pdf
    • https://uploads.strikinglycdn.com/files/cecfadf3-e00f-4e80-8a02-1a183d347c37/civ_4_mods_reddit.pdf
    • https://s3.amazonaws.com/legesiliv/hack_wifi_dengan_termux_android_no_root.pdf
    • https://s3.amazonaws.com/tawovojo/chicken_kebab_meat_nutritional_information.pdf
    • https://s3.amazonaws.com/novipaliwid/xosipabekixapezezi.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9a6.bin
ac40167b6ec76b9dbe229c84b695d6cf0b931ade926c5a5b8d3ae4d8eda7e186
pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A6 5228 bytes
font_01_sfnt_off0000db69.bin
5234199a8cc1e7d42492f3358a85cca510b063cf5b8f27fd7b22600be0bb253d
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB69 10412 bytes