Malicious PDF — malware analysis report

Static analysis result for SHA-256 496553882451dbbd…

MALICIOUS

PDF

76.1 KB Created: 2021-03-06 20:40:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4504d73423b4c3b74c65334227b95ddd SHA-1: dd1a566e9cf667c83f05d92458b348ff054b69ce SHA-256: 496553882451dbbdb42ca32dfe05af6405bbdb65e4a0e199176152b9c63fc711
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO poisoning or phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. The presence of embedded URLs and the heuristic PDF_SEO_LINK_FARM firing suggest the document is designed to redirect users to potentially harmful sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/strik?utm_term=how+to+make+robot+for+robowar+pdf PDF link annotation
    • http://coolmag.biz/gilonolubemujibutxsvg4.pdfIn PDF document text
    • http://zugapuvu.mywebcommunity.org/41717520610.pdfIn PDF document text
    • http://iblack.space/56773100637b2lwg.pdfIn PDF document text
    • http://yyyyyyhhhhh.space/zebekilanami9n3gd.pdfIn PDF document text
    • http://kiparegazeratax.getenjoyment.net/sularor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jisijuvod.myartsonline.com/pelutuwos.pdfIn PDF document text
    • https://0621cc9e-6449-4e8a-a8bd-baee9ad62a2c.filesusr.com/ugd/affb4a_4272aff1d3c24d9d9fc95191b97da8e6.pdf?index=trueIn PDF document text
    • https://73e25548-3913-4bbb-aa69-a1b25f69568d.filesusr.com/ugd/cece23_f2ee0ef7e50841858b82d94aa82338d7.pdf?index=trueIn PDF document text
    • https://59bb578d-b312-442a-858b-1a1a54b18a6c.filesusr.com/ugd/c79b1c_f14fc87eb9ce48b48496174a66ddaa35.pdf?index=trueIn PDF document text
    • https://45dcde1a-aed5-4138-b95e-a0f768a283bf.filesusr.com/ugd/89441e_e8c2343e52174075b2c65ea9140a21de.pdf?index=trueIn PDF document text
    • http://sogivuwe.onlinewebshop.net/zozelawogu.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/la_biblia_en_catolica.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/kaxamepezusatazavor.pdfIn PDF document text
    • http://rulamiji.onlinewebshop.net/36662547666.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/ninetuximubasavobar.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/55753225284.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/22403336478.pdfIn PDF document text
    • https://1a6defe7-92a0-4357-8a70-d3bce85d30c9.filesusr.com/ugd/385065_fa4605bd6bc74559bbb1959c53d3b88d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/neviwove/directv_genie_mini_wireless_bridge.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/79060484214.pdfIn PDF document text
    • https://s3.amazonaws.com/bogijexu/surfin_usa_flute_sheet_music.pdfIn PDF document text
    • http://fuvuvadut.onlinewebshop.net/78395765448.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_off0000ecb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB4 5232 bytes
SHA-256: 71c415e8f33776ecc1e86a13a30855d941e6e4ac495b23b6a340ee538ceae75e
font_01_sfnt_off0000fe76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE76 10892 bytes
SHA-256: ce11d14364992e7b25d79e8d040fd532e74c280c5dfbdc0eb9ab0046065361bc

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