Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed4eb459b0ae378c…

MALICIOUS

PDF

89.9 KB Created: 2021-05-20 12:33:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 9a26b8219de2b668b5268568e7c019c3 SHA-1: 2bc3644a10d70020deafbe4efd8339f587b0003d SHA-256: ed4eb459b0ae378c4133a25152d053720b5ba17b1aa7b3cad4fc88e586719cbd
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to benign content, but one critical link to 'vilenefex.ru' is flagged as suspicious and likely malicious. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with a phishing or malware distribution campaign. The document body, though heavily obfuscated, appears to be a lure related to a popular movie, aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • 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://vilenefex.ru/strik?utm_term=google+drive+john+wick+chapter+3+parabellum PDF link annotation
    • https://xowebanum.weebly.com/uploads/1/3/1/4/131453595/5475084.pdfIn PDF document text
    • https://pezobarifad.weebly.com/uploads/1/3/5/3/135394950/7836246.pdfIn PDF document text
    • https://besikedu.weebly.com/uploads/1/3/1/8/131871581/wawijeno.pdfIn PDF document text
    • https://xasigusuvenazuj.weebly.com/uploads/1/3/0/7/130739755/zasatumamij.pdfIn PDF document text
    • https://pigixona.weebly.com/uploads/1/3/5/9/135986477/narisawomanoju_bitomab.pdfIn PDF document text
    • https://mokoloxove.weebly.com/uploads/1/3/5/2/135299893/f14929bd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/anaganaga_video_song_aravinda_sametha.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/99545227262.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/mukore.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/tenopalinogubepinevewogo.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/kemubumowutavowabuwab.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/what_is_the_transpiration-cohesion-tension_theory.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/wukowobenixirexasoxemu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89c9cba6-5806-485d-ae37-13a1efad7d40/78956126853.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/86851429196.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/dosasesowovamutudumigofu.pdfIn PDF document text
    • https://s3.amazonaws.com/pojikovewijeja/chandrakanta_title_song_life_ok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f26a01b-bdd9-4bf9-8d22-f94137568962/58489627717.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/sistem_bilangan_real.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/kuxaretopepubar.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/star_spangled_banner_violin_solo_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19fe96ea-c099-49a9-a83e-3a2f233d126d/gojisoribesudevo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA53 10140 bytes
SHA-256: 75e69b0d7b37ac2ae3101e1824f4f09628b121c30071b768d37075d329696c4f
font_01_sfnt_off00011c6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C6B 5936 bytes
SHA-256: 5057a8972a669e1d873c5a4cd4c0cfd8aad2469a77c2ac2eaaf80e4b1f7a988e
font_02_sfnt_off00013096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13096 11960 bytes
SHA-256: 2e27bfcc8224c073c81ee270ae4823867b24cdac0a39d05967b2f623210daf2c

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