Malicious PDF — malware analysis report

Static analysis result for SHA-256 babe39d830b7c094…

MALICIOUS

PDF

109.4 KB Created: 2021-03-12 08:46:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7e77f455224c73e0dd272d6d85b7c6c SHA-1: d25026c779b0c6bc16a397b94a9acc399d000967 SHA-256: babe39d830b7c094fa85596fd3a3d7b077381302465e983ed5fb2fa584f206da
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier, indicating a phishing or malicious content distribution attempt. The PDF contains a large number of external links, many pointing to other PDF files, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URLs strongly suggest an attempt to redirect users to potentially harmful 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://golowaki.ru/award?keyword=agro+ecological+zones+pdf
    • https://cdn-cms.f-static.net/uploads/4485166/normal_603b71113ab49.pdf
    • https://tajewarupimef.weebly.com/uploads/1/3/2/6/132681391/nuzer.pdf
    • https://static.s123-cdn-static.com/uploads/4424405/normal_5fe20562552b0.pdf
    • http://puliliraforuwu.22web.org/baxudone.pdf
    • https://kesevaze.weebly.com/uploads/1/3/1/3/131383297/318eb39c706e4.pdf
    • https://mefosenide.weebly.com/uploads/1/3/4/7/134715399/4851745.pdf
    • https://dedemapisiwopiv.weebly.com/uploads/1/3/0/7/130775251/8303518.pdf
    • https://redodire.weebly.com/uploads/1/3/1/4/131408340/89cf7401.pdf
    • https://zokanebawabor.weebly.com/uploads/1/3/1/4/131438448/c0ea11de24b1.pdf
    • https://static.s123-cdn-static.com/uploads/4420224/normal_5ff332b485cb0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ed4d48c2-14ea-47f5-a89a-b82193587323.filesusr.com/ugd/8ce377_f1ea77fefa5341e8b6a61bcc09a0cf70.pdf?index=true
    • https://uploads.strikinglycdn.com/files/cfa8a89f-426d-402f-8a8a-0a2f6f5a4dda/kigosonezuwoworasu.pdf
    • https://f6180879-d31b-499c-8e42-fead7842c491.filesusr.com/ugd/007227_efb2e082b23a41fa982e9401582a7894.pdf?index=true
    • http://zisubaripuxiba.epizy.com/78806682783.pdf
    • https://2a4b29e6-a790-453e-81e7-e8b9caf2c27b.filesusr.com/ugd/bf0735_997c23bf3d2a42bf9ede9a001374c06c.pdf?index=true
    • http://lafeseg.rf.gd/70517084236.pdf
    • https://uploads.strikinglycdn.com/files/430f0c23-2083-4862-9358-016d6437ca1e/65629973123.pdf
    • http://dupunijasazo.epizy.com/78118743900.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_off00017127.bin
c39e9d2b8b48480b29b482c1f0515a91369575176785d5907315d22de158ef1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17127 5364 bytes
font_01_sfnt_off00018386.bin
9e9802765170323f015a865bb3eecbcae425d24bee29c7d0b3df4717a9fb6581		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18386 10824 bytes

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