Malicious PDF — malware analysis report

Static analysis result for SHA-256 462d12326df78888…

MALICIOUS

PDF

41.5 KB Created: 2020-11-04 02:57:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: d436d46b84ea5522f642975c14087d3f SHA-1: 55e9c70bf415dd5bf6be66a5246071ba697db1a3 SHA-256: 462d12326df78888c5840a4cfa8630b1d8e0c887988d1ae050610fa4e78dfeeb
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with one specifically identified as a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. The presence of numerous links hosted on disposable domains suggests an attempt to distribute malicious content or phish for credentials.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/aws?keyword=pigment+chromatography+lab+answers In PDF document text
    • https://bulasenojagaroj.weebly.com/uploads/1/3/4/3/134357248/845838.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368222/normal_5f99b4b9c011e.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/ponoj.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/porukofosu.pdfIn PDF document text
    • https://juzapojoxop.weebly.com/uploads/1/3/4/3/134370352/802a863f330de.pdfIn PDF document text
    • https://nifufoji.weebly.com/uploads/1/3/4/4/134458522/1228d7035ecbf13.pdfIn PDF document text
    • https://pukotegifo.weebly.com/uploads/1/3/0/8/130874060/4dfb8259603.pdfIn PDF document text
    • https://midepixa.weebly.com/uploads/1/3/4/6/134622545/bogupozagiji-rixozumusinileb-vuxonu.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/sinamozagemoger/examples_of_social_work_theoretical_framework.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/18886058255.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/underearners_anonymous_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/nadejefijivu.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_off00006295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6295 5684 bytes
SHA-256: 733d57bf063659bf205a3d56e3fe405bd7edd4458481573548a92f72f38b6115
font_01_sfnt_off000075d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75D1 10592 bytes
SHA-256: 766643941ddf1a9dd5356ef4afdf09e99d26ab15b82bff95b773647a0dda165f

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