Malicious PDF — malware analysis report

Static analysis result for SHA-256 f880f5ee677dd032…

MALICIOUS

PDF

68.5 KB Created: 2021-03-23 00:40:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f66104a6476a3ef2a3fc41838c7f130 SHA-1: dc5c9d41e0914ac67af3475adee999a675db7430 SHA-256: f880f5ee677dd032d8d2ea02929e0561e013d79d998255afc111c2ee8b5f7fdf
156 Risk Score

Malware Insights

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

The file is a PDF that exhibits characteristics of a link farm or phishing lure, as indicated by the 'PDF_SEO_LINK_FARM' heuristic and the presence of numerous external URLs. The primary URL, 'https://xezojetit.ru/wix?keyword=sister+outsider+audre+lorde+pdf+download', suggests a deceptive pretext to attract users. While no scripts were explicitly extracted, the PDF structure and the high ML and ClamAV scores strongly suggest 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://xezojetit.ru/wix?keyword=sister+outsider+audre+lorde+pdf+download
    • https://waxevinibiwe.weebly.com/uploads/1/3/0/9/130969944/4805263.pdf
    • https://kilosite.weebly.com/uploads/1/3/0/7/130739696/natazewizufuw.pdf
    • https://dalujukonuxuda.weebly.com/uploads/1/3/1/1/131163933/miwipanemos-zukotudegepel.pdf
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/79e807fb17.pdf
    • http://kazuxigunifaz.22web.org/31035620909.pdf
    • http://lagulesuko.medianewsonline.com/goniwifupifegeguzi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://palalujopaxuv.epizy.com/african_grey_parrot_breeding_information.pdf
    • https://s3.amazonaws.com/rikolesafuwofar/vue_b-_form-_select_change.pdf
    • https://s3.amazonaws.com/vogubivajavofu/temerezuwibotolu.pdf
    • https://e19809cf-df80-48c1-9975-8599b001ad7a.filesusr.com/ugd/062cdf_9c770b101faf4ec9972d32cf9b87513e.pdf?index=true
    • http://wafepugi.rf.gd/lutetaletuju.pdf
    • https://s3.amazonaws.com/nuxulikiwab/navusumolazopedi.pdf
    • http://lujufidopugola.rf.gd/blob_javascript_ie.pdf
    • http://jajoxutevo.epizy.com/32508590867.pdf
    • http://kaderuzaxaje.rf.gd/sqlite_tutorial_for_beginners.pdf
    • http://sivujezoz.rf.gd/adjective_clause_test.pdf
    • https://2b08c346-38d8-4763-b559-bb9d4fff2313.filesusr.com/ugd/40c9d6_dd503e1c0ff2492db9444bc8bf0e8bc8.pdf?index=true
    • http://wesatume.atwebpages.com/warcraft_3_original_map.pdf
    • https://s3.amazonaws.com/negonanopix/42507520812.pdf
    • https://s3.amazonaws.com/lovetijif/dolof.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_off0000cd07.bin
1f4f9515952bf138471b3c571dde761ae5f427ac9731311175af9cf5de0784f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD07 5232 bytes
font_01_sfnt_off0000def2.bin
0cf71fdec7ed16f786ed69215019be6636e30f81266d3f2a3b4781ea3bbd2163		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF2 10940 bytes

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