Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c96eb3409785e7f…

MALICIOUS

PDF

97.3 KB Created: 2021-06-08 02:17:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3c1ad3362d722288e519b3411b62a4a SHA-1: c5f65d50495726208145d17d41047db499802254 SHA-256: 1c96eb3409785e7fb5fea935a254e7bf069305027554bd699fd05382a51b509c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to potentially malicious domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://garglob.ru/pbw?utm_term=bianca+nieves+y+los+siete+toritos+pdf
    • https://cdn-cms.f-static.net/uploads/4371523/normal_5fd1c55b9c23f.pdf
    • https://cdn-cms.f-static.net/uploads/4373797/normal_60479fa07c4d8.pdf
    • https://static.s123-cdn-static.com/uploads/4483103/normal_6000b1a80fb6d.pdf
    • https://cdn-cms.f-static.net/uploads/4475016/normal_600c959bb6051.pdf
    • https://cdn-cms.f-static.net/uploads/4454430/normal_5fd78aed39efc.pdf
    • https://cdn-cms.f-static.net/uploads/4496153/normal_5fdb616465b46.pdf
    • https://renepavavoz.weebly.com/uploads/1/3/4/0/134012855/2a965e91806.pdf
    • https://kunudixi.weebly.com/uploads/1/3/4/6/134667289/2e683d.pdf
    • https://cdn-cms.f-static.net/uploads/4479454/normal_5fe68c9031de4.pdf
    • https://static.s123-cdn-static.com/uploads/4450504/normal_5fc7663bd37f9.pdf
    • https://wusulanapezuvu.weebly.com/uploads/1/3/4/3/134325740/kapok.pdf
    • https://cdn-cms.f-static.net/uploads/4401716/normal_602a859ebfa0c.pdf
    • https://cdn-cms.f-static.net/uploads/4463266/normal_6053159760463.pdf
    • https://cdn-cms.f-static.net/uploads/4458124/normal_6064e95a43507.pdf
    • https://xomarexisu.weebly.com/uploads/1/3/4/7/134701616/tezuz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tarogifere.pbworks.com/f/what_is_your_true_zodiac_sign.pdf
    • https://uploads.strikinglycdn.com/files/28582c0d-49d6-4566-b1de-172f27e1e626/ludix.pdf
    • https://uploads.strikinglycdn.com/files/62aaea99-9ff1-40f5-9d18-2ece4a194923/oracin_al_espiritu_santo_de_san_juan_pablo_ii.pdf
    • http://kolasotosexu.pbworks.com/f/zutodegavoribilugedal.pdf
    • http://momukaduwe.pbworks.com/f/69288482534.pdf
    • https://uploads.strikinglycdn.com/files/37db6618-c56a-4a3c-ab40-40f214d428be/introduction_to_computer_science_using_python_edx.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_off00013ade.bin
209d871b9d359d25a3597b5067bd08b4ee6facd718faf511470157d15b73a063		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13ADE 5360 bytes
font_01_sfnt_off00014d39.bin
6ce58ea48c44fd5ec786323bf6b797704298386d4fd47cf2f75dec0d67e3d299		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14D39 12548 bytes

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