Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e69a5ccc053b7ac…

MALICIOUS

PDF

77.5 KB Created: 2021-04-19 12:48:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba0bbf5e21921f6e5b93c9cc8c82f153 SHA-1: 2cdf5726c3fa9ac79fda6db2c148f8c6375387ed SHA-256: 5e69a5ccc053b7acf37dbc14a7fb0e61d2bc231c0b1edbc08dfecaefccec15f5
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the 'PDF_SEO_LINK_FARM' heuristic, suggesting a phishing or spamming campaign. The presence of multiple PDF links hosted on various domains, including those with suspicious naming conventions, indicates an attempt to direct users to potentially malicious content. While no scripts were explicitly extracted, the PDF structure and heuristics strongly suggest it's designed to facilitate the distribution of malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dafemum.ru/strik?utm_term=sikatop+seal+107+gcc
    • https://cdn.sqhk.co/tuxarulenogu/jejalhj/vumukafasogatobaj.pdf
    • http://logunesunoj.medianewsonline.com/spinal_cord_injury_rehabilitation_guidelines.pdf
    • https://vuvuzuvikedatun.weebly.com/uploads/1/3/4/5/134529562/635578.pdf
    • http://kixurox.getenjoyment.net/17495082898.pdf
    • https://cdn-cms.f-static.net/uploads/4367916/normal_6055052205022.pdf
    • https://cdn.sqhk.co/nowonipewo/eDBWgdF/iphone_map_navigation_voice_language.pdf
    • https://static.s123-cdn-static.com/uploads/4389816/normal_5fcc7bc73d99d.pdf
    • https://nolabuxovitu.weebly.com/uploads/1/3/5/3/135305824/tafeweguvumu.pdf
    • https://cdn-cms.f-static.net/uploads/4407306/normal_606a009d83959.pdf
    • http://sukutoxuwurif.mywebcommunity.org/class_10_sample_paper_2020_english.pdf
    • https://cdn.sqhk.co/kifateten/aQRL2bf/69966777250.pdf
    • https://cdn.sqhk.co/mekibekowufe/CGpdgel/80015156106.pdf
    • https://fakilopatezi.weebly.com/uploads/1/3/1/6/131606638/7851935.pdf
    • https://cdn.sqhk.co/damapegapi/fatiizi/7994513506.pdf
    • https://cdn.sqhk.co/jinubodilev/ZGifZJJ/58242701427.pdf
    • https://cdn.sqhk.co/vixawutozama/dijLYE4/games_launcher_booster_screen_recorder_mod.pdf
    • https://cdn.sqhk.co/foseziwate/wwiexgi/24555184280.pdf
    • https://cdn.sqhk.co/wepigosogo/iaNufxz/reluriwevigemoramuniludu.pdf
    • https://cdn.sqhk.co/nexasolonit/eiAzjeJ/bajegekazi.pdf
    • http://jonebosu.mywebcommunity.org/watufiviregexuxigo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e197.bin
e7cfe0dc1bb43774d95f59e1da793a7d07ae9c878afe82af5bffb211ef71e475		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE197 5128 bytes
font_01_sfnt_off0000f314.bin
3f734633560681225a95fec0a422a986cc18d91f6de8f161c371eb4cda020e5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF314 11196 bytes
font_02_sfnt_off00011915.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11915 4324 bytes

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