Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d52d25e394248ec…

MALICIOUS

PDF

73.7 KB Created: 2021-03-15 00:23:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86282106d9cb5d98de2d17d6e0df853e SHA-1: 82e12cb53b0958221fd0e5fcd525889fac8c1567 SHA-256: 3d52d25e394248ecb0f5a0ede74f30ca16971fc6f9348656b4054592c95084cd
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to a suspicious domain associated with phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further payloads or conducting phishing operations. The document body, though heavily obfuscated, appears to be a garbled attempt at presenting search result-like content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://midufefew.ru/wix?keyword=warrants+in+decatur+il
    • https://cdn-cms.f-static.net/uploads/4485313/normal_6046879fd6e61.pdf
    • https://static.s123-cdn-static.com/uploads/4370062/normal_6000db15b2e28.pdf
    • https://fesubinilare.weebly.com/uploads/1/3/1/8/131856970/vopulega_bojidozu.pdf
    • https://nikatomorufaxeg.weebly.com/uploads/1/3/1/4/131437252/7146479.pdf
    • https://paniselodo.weebly.com/uploads/1/3/5/9/135969975/3755b1b7.pdf
    • https://cdn-cms.f-static.net/uploads/4377663/normal_6048620a5f99f.pdf
    • https://digikugububim.weebly.com/uploads/1/3/0/7/130774990/f541b460b9b.pdf
    • https://mozevosiku.weebly.com/uploads/1/3/3/9/133999333/wezezawopawoj-zazewum.pdf
    • https://cdn-cms.f-static.net/uploads/4449187/normal_600ca65fe15c8.pdf
    • https://toxujubew.weebly.com/uploads/1/3/1/4/131437446/feditolazabubede.pdf
    • https://static.s123-cdn-static.com/uploads/4496571/normal_5ffe55fc308bd.pdf
    • https://dagigokes.weebly.com/uploads/1/3/0/7/130739756/1974f72.pdf
    • https://peruvapi.weebly.com/uploads/1/3/0/8/130813059/5406211.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ac3db616-04cb-40f1-8357-c67041f5e20c.filesusr.com/ugd/eda9ba_342392dea97c4d1fbc3e3472351b25af.pdf?index=true
    • https://9b08d158-0e0f-4203-9b31-e1272d977b1c.filesusr.com/ugd/086daf_cf4e34153ceb4c40a4b9556396c3db1c.pdf?index=true
    • https://s3.amazonaws.com/lixuzo/82380697947.pdf
    • https://a1bd7baf-2de3-4c81-8914-4b74a732ecf9.filesusr.com/ugd/c89f15_49c748b0bc974a6c87247b5f8a8498a3.pdf?index=true
    • https://d6b7b3c7-8429-4d82-9d75-5d5d09e763cc.filesusr.com/ugd/a8c229_f635ea9c2e07420a928d8b36db0ca2c4.pdf?index=true
    • https://s3.amazonaws.com/woxotopapozokev/android_apps_free_video.pdf
    • https://s3.amazonaws.com/nuvukivaxiren/kazugipozogog.pdf
    • https://s3.amazonaws.com/mefonevimimix/fazawo.pdf
    • https://s3.amazonaws.com/tamovagag/bopebexugufisiludakewi.pdf
    • https://4b3b4da4-1145-40fd-8a04-0ac29766dab0.filesusr.com/ugd/6c6203_939ceab687054c4ea4d360bd6894020f.pdf?index=true
    • 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_off0000e232.bin
2856e8fde9213ea7c16aec7c201f37ed9d01fe6144fa3c6d65342bfc00cf502b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE232 4948 bytes
font_01_sfnt_off0000f320.bin
bd158152cf824dd8b4394429b469b2e6e066d5f0d580470bd74febf963b56798		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF320 10812 bytes

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