Malicious PDF — malware analysis report

Static analysis result for SHA-256 777305578c3b6d60…

MALICIOUS

PDF

83.6 KB Created: 2021-03-17 23:33:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9b84f2b47f508b627dc8b37ccd1c8bf SHA-1: 22ae1d7b15ed92b5f85a6a2e764fc1625cb02a78 SHA-256: 777305578c3b6d6051db6b5279e5d813a22079c89a76fbe726b2578aee3f17cb
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with a critical heuristic firing for a PDF link farm. One of the embedded URLs, 'https://zajinet.ru/aws?utm_term=ruger+lcp+9mm+review', is flagged as unknown reputation, suggesting a potential phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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://zajinet.ru/aws?utm_term=ruger+lcp+9mm+review
    • http://frontend-developer-azaynullin.site/finojethzft6.pdf
    • http://ninotekega.mygamesonline.org/craftsman_gt5000_mower_parts.pdf
    • http://idealicaitalia.website/8132083163kncu9.pdf
    • http://tricitysikhs.com/csrss._exe_windows_76ersc.pdf
    • https://juxivuvamefuba.weebly.com/uploads/1/3/4/6/134694829/padikaxe-bixelenigud-javojowasidanav.pdf
    • http://fakurivevid.scienceontheweb.net/probability_measure_theory_ash.pdf
    • http://sbrf.link/287931524155hewm.pdf
    • https://semetipakes.weebly.com/uploads/1/3/0/7/130775831/217085d3a2305fa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://0fc0baf9-b884-4fcd-968e-f93c0f938930.filesusr.com/ugd/68ec51_86acb07af2a74823ae49e8cd19c9324c.pdf?index=true
    • https://2080fafa-2491-4ac3-8118-a138f33bff34.filesusr.com/ugd/822ecd_5dc6823cde8b470ba1dd029e191072cb.pdf?index=true
    • https://s3.amazonaws.com/dikobepibelun/how_to_talk_to_a_live_person_at_twc.pdf
    • https://4bd9ed84-c80b-4837-bb2f-b1353ebfd8aa.filesusr.com/ugd/5a1791_f569ec122d3940e18078147c1ff9b518.pdf?index=true
    • http://giworutiw.myartsonline.com/silubenupeb.pdf
    • https://77701ba7-c5ad-4750-ab17-5b03548f7fc0.filesusr.com/ugd/9a242c_acb20fbf02754fddb624e86324d9296b.pdf?index=true
    • https://s3.amazonaws.com/panalipolifod/kimutuvakusakoruk.pdf
    • https://c827806f-f9bf-4fd3-a4ce-e487c020fa79.filesusr.com/ugd/6fd45c_9f4c431b4ebc4f3394137e93ca441982.pdf?index=true
    • https://s3.amazonaws.com/vitelitubovuluj/46179209727.pdf
    • https://56148a0a-83a3-4003-94ff-78d3044b7c00.filesusr.com/ugd/6f5f23_26b8125198b04f09a3f85745bb8bbbef.pdf?index=true
    • https://s3.amazonaws.com/vinivuxo/56697891988.pdf
    • https://a3e8d6b6-68ee-4625-a313-a25a09dbd39d.filesusr.com/ugd/312e12_e354cd3139e44f7dac77ac2754a48754.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_off00010b0e.bin
6823c4d7c3ca30e30e2d94d9ea4d15f06bf1c5098cb68f61d849e19461a0fe3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B0E 5180 bytes
font_01_sfnt_off00011cbf.bin
f5902033c35ea17b1071d050353119963ad4952fe87441d779744b947363978d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CBF 10848 bytes

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