Malicious PDF — malware analysis report

Static analysis result for SHA-256 46df48fd4ab669d2…

MALICIOUS

PDF

79.2 KB Created: 2021-03-11 23:03:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2c8244180faccecd790bdae0d3c614ae SHA-1: c285b32e4b4f9af9f7f25b71d84d91e44a660d70 SHA-256: 46df48fd4ab669d2017e1faa5d075dd917c45095ea23c11c7d825d0518f11618
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The document body text, though partially garbled, indicates a lure related to 'academy of art university application pdf', likely to entice users to click the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xajibur.ru/award?keyword=academy+of+art+university+application+pdf PDF link annotation
    • https://surugodinatuv.weebly.com/uploads/1/3/4/8/134861851/sowefusazebulosubib.pdfIn PDF document text
    • http://rivilidopu.medianewsonline.com/whats_the_difference_between_summarizing_and_analyzing.pdfIn PDF document text
    • https://vodexekuteb.weebly.com/uploads/1/3/0/7/130776001/riter.pdfIn PDF document text
    • https://lafozevu.weebly.com/uploads/1/3/4/3/134378288/tesuripapoxebe_xepufivafelepif_rokasizag_lupag.pdfIn PDF document text
    • https://volafonozus.weebly.com/uploads/1/3/0/7/130775232/f09650c52086.pdfIn PDF document text
    • https://zoguripan.weebly.com/uploads/1/3/1/0/131070442/peperevopowura_gaboxo_xovipog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383804/normal_60197687d861c.pdfIn PDF document text
    • http://fodekofuxuvum.sportsontheweb.net/jotoxiderorozu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387241/normal_60401fd08c521.pdfIn PDF document text
    • https://xowuxuwakewobi.weebly.com/uploads/1/3/4/8/134853014/9a5d44fd00ccf96.pdfIn PDF document text
    • http://basagutidabe.sportsontheweb.net/nextbook_ares_8a_stuck_on_boot_screen.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/napopaf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382186/normal_5ff104a2ee1c3.pdfIn PDF document text
    • https://nunamifeko.weebly.com/uploads/1/3/2/7/132740424/madiju.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393489/normal_60013a7360f7d.pdfIn PDF document text
    • https://radumudoxelis.weebly.com/uploads/1/3/4/2/134235428/7188144.pdfIn PDF document text
    • https://bamebifubakuta.weebly.com/uploads/1/3/1/4/131408159/4922296.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wegugoleta.onlinewebshop.net/jovux.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B1 5452 bytes
SHA-256: 923505bcc1f73a701cf1ac04b8a8e03ec6328ff571c91591455005f4ee00efa3
font_01_sfnt_off00010a3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A3F 10888 bytes
SHA-256: a08986ed495aef5ba9bb4ceb6a4ef6c69c606a17263e50477d625785733df9c5

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