Malicious PDF — malware analysis report

Static analysis result for SHA-256 22943564141aa2d2…

MALICIOUS

PDF

86.3 KB Created: 2021-03-06 14:07:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7871320414370a2a8758efe6f2d7f8b SHA-1: e8f671805f6548fb40dc61f0f4ef00f84dcd15ec SHA-256: 22943564141aa2d22d35ccaefe4957789011ade60fc5e8ddc0001bc844ac88df
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, with one prominent link pointing to a URL that appears to be a search result for a technical issue, likely intended to deceive the user. The presence of embedded URLs and the overall structure suggest an attempt to redirect users to malicious content.

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/wb?keyword=samsung%20ipolis%20ddns%20failed%20to%20find%20a%20router
    • http://koponegigat.medianewsonline.com/51687913379.pdf
    • http://zekifafeter.scienceontheweb.net/wukubisefak.pdf
    • http://jujovobima.getenjoyment.net/gafutagikufikugetumat.pdf
    • http://www.samsungipolis.com/ipolis/ipoipolis.asp
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://19972ee8-34f0-4900-8009-9f590161cd02.filesusr.com/ugd/64db51_40caa56cf13d4355b232d8fd86924387.pdf?index=true
    • https://uploads.strikinglycdn.com/files/036a078d-a31b-40ab-9d67-90d86296abb6/google_maps_live_street_view_iphone.pdf
    • https://s3.amazonaws.com/xoferuzu/18454923264.pdf
    • https://s3.amazonaws.com/wulagisi/54902105216.pdf
    • https://s3.amazonaws.com/feseni/78181184467.pdf
    • https://s3.amazonaws.com/sojebelevenex/jebejerokutuz.pdf
    • http://tipokeviti.atwebpages.com/john_deere_950_tractor_engine_for_sale.pdf
    • https://s3.amazonaws.com/vovabagubajegeb/gojabituxo.pdf
    • https://s3.amazonaws.com/nuselufuzo/realidades_2_capitulo_1a-_8_crossword_answers.pdf
    • https://uploads.strikinglycdn.com/files/89b53b18-7ebd-41d5-8354-7182b620287c/how_to_enable_bluetooth_keyboard_on_samsung_smart_tv.pdf
    • https://uploads.strikinglycdn.com/files/4d1b33b7-ee55-46cf-9553-94e46b98fb0f/nawulifogapum.pdf
    • http://pikaderobiw.atwebpages.com/what_is_cloud_technology_in_simple_terms.pdf
    • https://2e907eb7-0cdb-46e5-a4de-ff0e34d1b96e.filesusr.com/ugd/7ea2c5_351bb9972d184284b984482174d64b71.pdf?index=true
    • http://wuwedilejom.myartsonline.com/wepudexowututek.pdf
    • https://uploads.strikinglycdn.com/files/bfd705b9-54c9-4ebd-97be-99beb9a8c028/dulibaromixijun.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_off00011312.bin
5b332b2896a3d68e0fdfa7313d10f1a3a0a701f3a0375c29d0650aa71a5a6429		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11312 5464 bytes
font_01_sfnt_off00012590.bin
4550378e99207a56f4de37b8df1093a155b69100de29c48b98a5cfc840180a97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12590 11336 bytes

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