Malicious PDF — malware analysis report

Static analysis result for SHA-256 3701ff40e8dd0b7b…

MALICIOUS

PDF

67.3 KB Created: 2020-11-24 16:15:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 8825a8295454fd61e6619ef4564a818f SHA-1: d07a9bfaf33c44722215e2b730fdb0ebd6cf10e3 SHA-256: 3701ff40e8dd0b7bb641d0b7347be2de8922f4df491bbbfe6cfc5b7fca18aa42
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be a lure related to 'Hammerhead pool vacuum reviews'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery via the linked sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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/strik?utm_term=hammerhead+pool+vacuum+reviews In PDF document text
    • https://tedemikof.weebly.com/uploads/1/3/4/5/134593475/gavozamimozaxa_rafitepiparam_maxuf.pdfIn PDF document text
    • https://jowojebutoda.weebly.com/uploads/1/3/4/4/134487303/koxor_bumululixiwof.pdfIn PDF document text
    • https://purusoze.weebly.com/uploads/1/3/4/4/134495244/zazalikemaropinowat.pdfIn PDF document text
    • https://nasotatuji.weebly.com/uploads/1/3/4/3/134392375/poxogejatese.pdfIn PDF document text
    • https://tiluzapibijodok.weebly.com/uploads/1/3/4/2/134265907/xawetawepujelej_dukenunil_nuvuludoduzuxuz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e058fa9d-0a9c-4fd2-bc92-73a78d5936cd/1416276213.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94909dc7-8c6d-410f-ad57-ecad0fe75ce3/tabonuwatos.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/playmobil_police_station_5182_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db930813-864a-4bf5-8c68-e2d7afa8ae0b/graphing_sine_and_cosine_functions_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/95432438753.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ec6ffbf-5522-4a24-a321-34c597cf91e3/jofuneze.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_off0000c2ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2BA 5424 bytes
SHA-256: af390c13e6734b307e179f96381782704155c7fe321671da392266ae67f1a53b
font_01_sfnt_off0000d50c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD50C 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0000dd9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9A 10100 bytes
SHA-256: d875abbe328953f5a30a35510b2239374a24a73a36b04f4ca0d4364fd0f65829

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