Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae103a4678f2736c…

MALICIOUS

PDF

86.4 KB Created: 2021-03-24 17:08:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22678e20754203317a3443c718be1618 SHA-1: 2aee0c3c03a6a586681324ecb3051c26b067bec7 SHA-256: ae103a4678f2736c0c2aaddd6f324e773b0af2b55ddbf42f1e13418761c9e758
156 Risk Score

Malware Insights

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

The PDF file contains a high number of external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to potentially harmful content.

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-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://leonvi.ru/wix?keyword=cool+math+games+unblocked+red+ball+4+volume+3
    • https://cdn-cms.f-static.net/uploads/4386622/normal_603128e4b2829.pdf
    • https://cdn-cms.f-static.net/uploads/4454281/normal_6028a062bb9e4.pdf
    • https://cdn.sqhk.co/jotepomi/dkiijhi/berivaburaripukese.pdf
    • https://cdn.sqhk.co/tejosepu/xJ1icif/10309963806.pdf
    • https://cdn.sqhk.co/muzorefu/yKHojjC/mechanical_energy_meaning.pdf
    • https://cdn.sqhk.co/novimabe/chgifid/17374754429.pdf
    • https://cdn-cms.f-static.net/uploads/4426944/normal_6044330f97b02.pdf
    • https://cdn-cms.f-static.net/uploads/4445555/normal_6018e98e26384.pdf
    • https://cdn.sqhk.co/gudopokobipa/jdheDaQ/radio_fm_app_without_internet.pdf
    • https://cdn.sqhk.co/zikonidenijo/DGehdRA/92795953209.pdf
    • https://cdn.sqhk.co/joxipadij/KjahjXo/pictures_of_kitchen_and_family_room_additions.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/ee76f34c-63e4-40ba-bcf3-5b98128fdb52/guwugejuxosefemadabes.pdf
    • https://167c8e7b-8160-49a2-a88e-f26749d647c8.filesusr.com/ugd/1ad47d_cf38d8d022784e6bb7e09512a8426786.pdf?index=true
    • https://728bf1be-24e3-4891-ba98-fedceca1a503.filesusr.com/ugd/3268c8_c32f6f8a742e46eab42d9379d646a4d3.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2ba4350f-615d-4ae5-b34b-a740ed9c94a1/how_to_use_weight_watchers_scale_by_conair.pdf
    • https://uploads.strikinglycdn.com/files/08f856a3-f775-4bc0-8b3e-63ad6e4ce5c2/what_are_the_different_types_of_aggression_in_sport.pdf
    • https://uploads.strikinglycdn.com/files/ccbb870b-ac8c-4f8c-9513-e67124e72ab9/is_there_a_hunger_games_mockingjay_part_3.pdf
    • https://bb209e34-24c3-4901-88bd-c00af8cda710.filesusr.com/ugd/de6798_bf76da3e27b84d3e9da9e516edd2f0b3.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2c970d10-3e4c-414b-a9d4-e5ad0b5c3333/indian_stock_market_live_software_free_download.pdf
    • https://uploads.strikinglycdn.com/files/2ffce574-f93f-4773-ab70-779e7a8c3d86/19859631903.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101ec.bin
a7dbe54e7a0c3dab426a9596a839cc491b18ce380520c733c553061b245467e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101EC 5728 bytes
font_01_sfnt_off0001154f.bin
5670d1a71cd84cfd2f12d703d5731e064f3cecef1b4d464953f3bf31ce3dd391		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1154F 11984 bytes
font_02_sfnt_off00013db4.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13DB4 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.