Malicious PDF — malware analysis report

Static analysis result for SHA-256 12b3435bda706e1b…

MALICIOUS

PDF

54.8 KB Created: 2020-11-06 13:50:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 0425a7d2eaf12e83bcaa0d1bcb4647ef SHA-1: 01c6b76103d6a61ecf9e45b94a231931bcb91cb7 SHA-256: 12b3435bda706e1b7509fbd29ea9caae3abea78e2e162e4d3b2e09d18d604370
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm or SEO spam campaign. The presence of these links suggests an attempt to direct users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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?keyword=quadratic+applications+worksheet+answers In PDF document text
    • https://givifajilodox.weebly.com/uploads/1/3/0/8/130874655/1e7e928ed4f.pdfIn PDF document text
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/2627487.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/numegubowalonan/raxekonotelixeni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d03f7997-0436-48d1-919b-e386fd8a6085/32637822759.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/58775365877.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/anzio_italy_pics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63b164a0-075d-4177-82ed-193d3afb6f51/64909559050.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/last_stand_3_game_hacked.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/crear_afiches_online_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7989c11-a6b1-4373-8e49-aa17de74e89c/palabras_compuestas_ejercicios.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/xojuwotuxofuja.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/applied_mathematics_3_hari_arora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac9f3586-7bab-4570-bc6f-9708ac84e62d/tenuganasubevepetesaj.pdfIn PDF document text
    • https://s3.amazonaws.com/pofumapetat/luxujebogejunugaji.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_off00009388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9388 5380 bytes
SHA-256: 75b81314faecb40383f7d87198d48692e6e1dcbf8fe4aea5a2ec13535955b6ec
font_01_sfnt_off0000a5db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5DB 12008 bytes
SHA-256: 43df2b2c998cc189b0b19f3ad1f73446413c2f81ea75d3e4714db7f8cb0f2a4d

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