Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe193e4b55413f64…

MALICIOUS

PDF

69.5 KB Created: 2021-04-04 03:54:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e88b0cbd56e7ebd29e78d7fc0239124 SHA-1: 72955ff3a5132fa5729cee4b7d16891066651257 SHA-256: fe193e4b55413f64bf1e33bd927c3dc8f3dfd4f5b9b7c8a8214f5ab5f9f56181
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or malware distribution lure. It contains a large number of external links, many disguised as PDF files, suggesting a link farm or redirection scheme. The embedded content, though heavily obfuscated, appears to be related to a Minecraft mod, likely a pretext to drive traffic to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/wix?keyword=minecraft+fly+mod+1.8.9
    • https://static.s123-cdn-static.com/uploads/4485578/normal_5fd07b28ccf5a.pdf
    • https://cdn-cms.f-static.net/uploads/4409394/normal_6034ca5a65edc.pdf
    • https://petuxomurekag.weebly.com/uploads/1/3/0/8/130874153/1713509.pdf
    • https://fomoxizukewoviw.weebly.com/uploads/1/3/0/7/130739072/144766.pdf
    • https://xunusavijogomos.weebly.com/uploads/1/3/4/7/134702941/4423ddd016f.pdf
    • http://xijonofupawulo.mypressonline.com/89157335749.pdf
    • http://starkrobotics.org/domimukopajisbl35.pdf
    • https://boretenewur.weebly.com/uploads/1/3/1/4/131453221/dedan_lomejapi_tidobixexored_dixalenaz.pdf
    • http://tepifugamokeg.medianewsonline.com/jurnal_retinoblastoma.pdf
    • https://tibefuwejar.weebly.com/uploads/1/3/4/3/134332688/xojonejerak.pdf
    • https://zexiditituluw.weebly.com/uploads/1/3/4/7/134734655/4bfffe9fc.pdf
    • http://norasuzajo.mywebcommunity.org/bls_pretest.pdf
    • https://belonimilulufaf.weebly.com/uploads/1/3/4/4/134403367/lififof.pdf
    • http://pokemonrivals.online/worolamaxisazakurasexur7na18.pdf
    • http://lazujifoxupa.getenjoyment.net/48409487084.pdf
    • http://onlyforyou.space/derwent_watercolor_pencils_individualqhnlv.pdf
    • http://faripofijukevom.mywebcommunity.org/30823460313.pdf
    • http://usesol.xyz/age_of_sigmar_core_rules_errataw1z9d.pdf
    • http://kawafopi.mygamesonline.org/90183291372.pdf
    • https://suvamowifav.weebly.com/uploads/1/3/4/3/134351486/fb85ed67b1.pdf
    • http://wififej.mypressonline.com/nutekurakexe.pdf
    • http://bogipeborowe.sportsontheweb.net/6723238990.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dejibokakar.onlinewebshop.net/tejomuxiroradapuj.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_off0000d1ae.bin
d52b8d8ea57a7b27c9f1d3dfc5fdfcbdc5fab5db4534091931dc04b3407a7e17		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AE 5532 bytes
font_01_sfnt_off0000e487.bin
a41b665b7e1e62a89fce04a41534edf6ea0591e12943ed6fe1ca05591e0ded53		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE487 10544 bytes

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