Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7620338cf2d7c26…

MALICIOUS

PDF

113.7 KB Created: 2021-03-17 05:14:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8354a2a246f458573ae52ddb4282c5dd SHA-1: 2f74778abbc896dba0ed6069d64d6059c7ff1ede SHA-256: e7620338cf2d7c26d0388f405f3b3711b79904f5e065a12e897088a733f0856d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a primary focus on directing users to 'fokemale.ru'. This URL is associated with a keyword search, suggesting a phishing or content-luring tactic. ClamAV detection and ML classification strongly indicate malicious intent, specifically identified as a phishing trojan. The presence of embedded URLs and the PDF structure point towards an attempt to exploit users by directing them to a malicious site.

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://fokemale.ru/wix?keyword=journey+across+time+pdf+chapter+15
    • https://terapizi.weebly.com/uploads/1/3/1/8/131857024/3134339.pdf
    • http://fibipowokogo.sportsontheweb.net/modaxekosubepakexodopid.pdf
    • https://benezome.weebly.com/uploads/1/3/5/4/135400217/jowuruta.pdf
    • http://nufivuzelikonax.getenjoyment.net/current_affairs_june_2020_download_in_english.pdf
    • https://dinowupeguf.weebly.com/uploads/1/3/1/3/131379410/sulup.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/84e1cc43-68c8-4b36-8873-567ecdfe52b1/88082644222.pdf
    • https://s3.amazonaws.com/retisovojor/45704101966.pdf
    • https://ef733714-782c-48ea-8991-1bc0bf0c95f2.filesusr.com/ugd/ad2ade_6b090ee9297f47a0a4d76c9ed0453e15.pdf?index=true
    • https://s3.amazonaws.com/taguxif/liwoso.pdf
    • https://s3.amazonaws.com/futamo/word_2016_shortcuts_mac.pdf
    • https://s3.amazonaws.com/wizedumi/rirunid.pdf
    • https://s3.amazonaws.com/nefagolom/cross_platform_games_switch_and_pc.pdf
    • https://30c74dc1-c3f2-4e71-8253-1ec84f3b94e1.filesusr.com/ugd/b8c6fa_58d95fc0844d45a7b09e569608c52a6d.pdf?index=true
    • https://d56a38bf-d62e-453c-9b5b-5b2fe88aea46.filesusr.com/ugd/359e64_635b0a7c8f9944e2a381b15033151eab.pdf?index=true
    • https://83bd47e3-138d-48d8-8d00-514fe13b91b0.filesusr.com/ugd/c87a2f_730f32a0645048ef93d942153898452b.pdf?index=true
    • https://cf075d60-af7c-4c71-a16c-5c8c125a9bb7.filesusr.com/ugd/cc03df_9a7272278dca41ea81fef02100ee3095.pdf?index=true
    • http://widepidaba.atwebpages.com/digital_electronics_textbook_free_download.pdf
    • https://7a48fde5-f9d1-4ce4-84a2-8b156d245d18.filesusr.com/ugd/8127dd_84eea1dfdeb240dfbd85f5588e52e046.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8f97f2ba-b550-4ce7-8d23-8dee9128fd11/kalixelok.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_off0001819b.bin
a9fa668718f0bac08b698fdc5ee7f93d0651cd73086b19d20391cf5a7cdf01da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1819B 5632 bytes
font_01_sfnt_off000194a9.bin
1045ecd9ebe2c3d43d61ffb83ea3af8dda853e9d2cbf2163e18db0291db38518		 pdf-font-stream PDF embedded font (sfnt) at offset 0x194A9 11052 bytes

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