Malicious PDF — malware analysis report

Static analysis result for SHA-256 646843769739e4e3…

MALICIOUS

PDF

49.5 KB Created: 2020-10-01 00:37:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: fe65299e2ed4f03da91b2a713ae2f7b8 SHA-1: b4f87c9f68956405874ad6bcfa91e644612e7000 SHA-256: 646843769739e4e39964743783728034c56ae5031cfc047cf92c979dc42651b5
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/strik?keyword=sheet+metal+bending+machine+design+pdf In PDF document text
    • http://gigifeno.skintwalletsusa.com/uploads/1/3/1/4/131410872/vedazirovib.pdfIn PDF document text
    • http://files.rvmaverick.com/uploads/1/3/1/4/131437728/jafotosi-guritebob-mozanomili-bixilemejipakem.pdfIn PDF document text
    • http://files.kingdomofhindh.com/uploads/1/3/1/4/131437385/vodapoxi.pdfIn PDF document text
    • http://files.artspeaks.net/uploads/1/3/0/7/130740242/fazafopavote.pdfIn PDF document text
    • http://files.musicfromthewestcoast.com/uploads/1/3/1/3/131398182/lakelulekaxotuv.pdfIn PDF document text
    • https://site-1036960.mozfiles.com/files/1036960/polalenijo.pdfIn PDF document text
    • https://site-1037028.mozfiles.com/files/1037028/zupodevimavavifejogu.pdfIn PDF document text
    • https://site-1037124.mozfiles.com/files/1037124/kajewitewafajominepozona.pdfIn PDF document text
    • https://site-1039513.mozfiles.com/files/1039513/97993116552.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8832/1437/files/arabic_dictionary_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/11084013043.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8481/0907/files/principles_of_business_forecasting_keith_ord.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1b9c829-0bf6-4cde-ad1f-6d740ce4f560/58317285052.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba7a999d-36c6-450a-bfe0-a53f601cf470/61966569193.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_off00008203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8203 5716 bytes
SHA-256: 9350a205c2d80d5d795fdb41e92f31beb1c52acad71fb6d6e51a646f941477da
font_01_sfnt_off00009550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9550 10460 bytes
SHA-256: 77acd44440e77d53958b37b1a34f8be4aedad40a956800b0cf91569bd4b9fa97

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