Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc7485b8ff033cfe…

MALICIOUS

PDF

75.2 KB Created: 2021-04-11 10:43:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 01ae270861aa87beae739078c829fa0f SHA-1: b088b6e8e9ca791f4be7d8db5e1007bfae4b3481 SHA-256: dc7485b8ff033cfe3c136fa64dc54f4bece1e89bda6442b021e3ad7355873312
126 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 URLs pointing to a link farm hosted on disposable domains, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://lozipotod.ru/strik?utm_term=fitbit+versa+lite+vs+versa+2+reddit PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4455174/normal_5fe2c1524975c.pdfIn PDF document text
    • https://cdn.sqhk.co/tetolonul/heshe7f/pepper_wears_iron_man_suit.pdfIn PDF document text
    • https://cdn.sqhk.co/ditutafewaw/bhbCgh0/cruise_deals_from_florida_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501482/normal_602b0ac49c7df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472788/normal_6037d64875a85.pdfIn PDF document text
    • https://cdn.sqhk.co/zezoxomop/eVmijGm/gakitem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373753/normal_5fe6a63aef1f2.pdfIn PDF document text
    • https://badakawage.weebly.com/uploads/1/3/0/9/130969543/xenavuxokus_jizejirajitoso_jijaxoviz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495849/normal_6068bda876582.pdfIn PDF document text
    • https://figagukedeliv.weebly.com/uploads/1/3/4/0/134040575/powezifini.pdfIn PDF document text
    • http://noveratufexi.22web.org/dufejupanofevotel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gimukuwizipuk.epizy.com/chennai_gana_music.pdfIn PDF document text
    • https://79d86aa2-23c4-4aa0-a0dc-c16ac59ae55d.filesusr.com/ugd/ecb701_e37903376a3a49988e7f8e634491fb15.pdf?index=trueIn PDF document text
    • https://ff4d9611-e7ea-45f2-85d3-f0b464ef817f.filesusr.com/ugd/48f461_96de71b96ac843abb05ab7b7f3c5ceb8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/pioneer_mosfet_50wx4_set_up_menu.pdfIn PDF document text
    • https://8a833fea-7c9a-4d2e-a5a7-d3590f42a3e5.filesusr.com/ugd/9aab09_06ecf0cd9b4c484298a82e3d02d7dcd4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nonabafat/99861985549.pdfIn PDF document text
    • https://c4647614-9ff8-4b00-b819-08dc938bd166.filesusr.com/ugd/5d3f24_d0c473f800fe49558a1d445e8ae4a898.pdf?index=trueIn PDF document text
    • https://70cd2525-e88e-4751-9e03-326799ace9c0.filesusr.com/ugd/165585_ee1d986d7c9441558b83dcc8846b653e.pdf?index=trueIn 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_off0000e920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE920 5108 bytes
SHA-256: 967f47258391a73feb09ca642cc4d26f75ec5c6c412eb89a056e068cc8a7c545
font_01_sfnt_off0000fa95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA95 10824 bytes
SHA-256: f47dd486b445f34956c29745d2ccc93e59cff1f0906b4f846ae5c0ab8dd9d119

Open this report in the interactive analyzer, or submit your own file for analysis.