Malicious PDF — malware analysis report

Static analysis result for SHA-256 c310b4960ecf9973…

MALICIOUS

PDF

76.3 KB Created: 2020-11-25 03:55:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 32797319d7454e7009f0b8788fc75573 SHA-1: 9c9213897441d9948d5fe5c0c8f9514bfb4c878e SHA-256: c310b4960ecf99730aab794ea0bbd8803c9289ec5ca76108277d347a362e1833
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with the primary one leading to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'Daz loader'. The presence of numerous external PDF links further indicates a link farm or redirection strategy. The ClamAV detection and ML classifier strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/strik?utm_term=daz+loader+unsupported+partition+table In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413454/normal_5fa5e8d6aafa0.pdfIn PDF document text
    • https://betutinixe.weebly.com/uploads/1/3/4/4/134481053/fusomosesivapaf.pdfIn PDF document text
    • https://xabisemegebo.weebly.com/uploads/1/3/4/4/134491474/moropirokov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455659/normal_5fab5a274c6f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425009/normal_5fa830cf6c7ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414161/normal_5fbac781ec675.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377100/normal_5fbd87e650a21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476938/normal_5fae11886f01b.pdfIn PDF document text
    • https://juwimifabofif.weebly.com/uploads/1/3/4/3/134369341/05d0ccfdb2ec79e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416786/normal_5f98e30f3a188.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/tedowafomaru/zisopejeputegajali.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/jugomuxure.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/al_ghazali_le_livre_de_l_amour.pdfIn PDF document text
    • https://s3.amazonaws.com/sukedil/real_steel_apk_unlimited_money_download.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_off0000ec41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC41 5144 bytes
SHA-256: c1e159e01629e6f2274f925e8549be42b32371ff8fb685fe4664450790062ab8
font_01_sfnt_off0000fdce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCE 11416 bytes
SHA-256: d218b55d87383770573edf413e17c157a31fcf725e4e274b808fa49513ffb041

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