Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff5f1de5c611eb7a…

MALICIOUS

PDF

69.8 KB Created: 2020-11-18 04:24:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 408bbdd963943495653bbece72c826b7 SHA-1: 7ac5d5cd6eb950da35bfb6df4f740f86ec86ad16 SHA-256: ff5f1de5c611eb7a98489e12445095aa39e79e4b0046a428ad3d98360fe82236
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://cctraff.ru/123?utm_term=solicitud+de+pasaporte+ordinario+mexicano+en+las+oficinas+consulares+%2528op-5%2529`. This, combined with a PDF link farm heuristic, indicates the document's primary purpose is to lure users to malicious sites. The ML classifier and ClamAV detection further support its malicious nature, classifying it as a phishing trojan.

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://cctraff.ru/123?utm_term=solicitud+de+pasaporte+ordinario+mexicano+en+las+oficinas+consulares+%2528op-5%2529 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4475988/normal_5fad3c3a64a9e.pdfIn PDF document text
    • https://varivupe.weebly.com/uploads/1/3/4/4/134480773/fagegumerududiweg.pdfIn PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/vidabaranibul-rivenijenudad-kiwon-vitobugozukiriv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/ba7e0e24-eb71-417e-af66-4f1e8039d0b1/peliculas_de_accion_em_espanhol_grt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8757358-d5f0-421b-9ca6-6b0a6a4463e8/totakanoposometizepa.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/respiracion_celular_aerobica_y_anaerobica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f845bf95-e568-44bd-9867-fc62f9a6cf6c/ffxiv_blu_masked_carnival_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pokixovuxik/dowefuwagonikavuvus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d3d5ea4-4b69-45ea-a492-8b798538fc13/levap.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/83681051336.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9554899-9802-47da-b223-ca605ad50ce7/vuxedofusinisexeto.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_off0000c31b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC31B 5664 bytes
SHA-256: 2aa3a108ff5cce70b98284f02726895039b01655ca3292c69ff42bef38a1eb7b
font_01_sfnt_off0000d64f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD64F 10900 bytes
SHA-256: 37df28dc615059863f401dc8b725129cbf3eb4dd7803d878bce7d6e2dd16d27b
font_02_sfnt_off0000f9bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BF 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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