Malicious PDF — malware analysis report

Static analysis result for SHA-256 f03c4802e9845318…

MALICIOUS

PDF

66.2 KB Created: 2021-01-11 23:55:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2ae7a80b89c9cad75a2ae4ccbc1d3db3 SHA-1: 78b94ab287180bc12a83758091f0edfba1d9a527 SHA-256: f03c4802e984531822277483d725d7382836ef52ab01c61d2e795dab737f78fb
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. The embedded URLs suggest an attempt to direct users to malicious or phishing sites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ggtraff.ru/123?utm_term=planes+of+body+quiz In PDF document text
    • https://miwovikefutus.weebly.com/uploads/1/3/0/9/130968988/d1761.pdfIn PDF document text
    • https://putepinezuvoko.weebly.com/uploads/1/3/1/8/131856998/zebule_rikipulal_pexeni_tofejew.pdfIn PDF document text
    • https://cdn.sqhk.co/gemadaruvow/0gjfn3s/zipodemez.pdfIn PDF document text
    • https://mezuxanivatanid.weebly.com/uploads/1/3/4/4/134499991/5821640.pdfIn PDF document text
    • https://xuwuperozaposa.weebly.com/uploads/1/3/2/3/132303395/3996995.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/3muSmuo/19400732963.pdfIn PDF document text
    • https://jezaxegare.weebly.com/uploads/1/3/1/3/131380636/c13c26f56bd733.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/jodabiladezot/altaf_hussain_song.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/9493625798.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/55610993679.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/adsorption_meaning.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_off0000c706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC706 5224 bytes
SHA-256: 2796c41b4c88d700b3bb461dad3ec6c0c67dd5eab4e6634927025f4f23a0b669
font_01_sfnt_off0000d8e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E9 10524 bytes
SHA-256: 8f9a808beca14ceb3296ad099da07e872c0f9a0d68d664e92b9ffc7a66266303

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