Malicious PDF — malware analysis report

Static analysis result for SHA-256 74d714eca505e2bd…

MALICIOUS

PDF

73.9 KB Created: 2021-04-02 06:45:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: bd80f1eb907a66b662952ed5cdbb46e6 SHA-1: 385b717d755c2711f2a5836f4a3d502717720ece SHA-256: 74d714eca505e2bd618afd6bb39a22fac3bbfd383d0c6177b05209cc744851f1
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users to potentially malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://dugedepap.ru/strik?utm_term=d%2526d+3.5+wizard+items PDF link annotation
    • https://ninefajesazaga.weebly.com/uploads/1/3/5/3/135384029/sumapugif_fafes_sezumabazokur_kawut.pdfIn PDF document text
    • https://milonotupilo.weebly.com/uploads/1/3/5/3/135347339/vowumanitalaleroneju.pdfIn PDF document text
    • https://dolopexoje.weebly.com/uploads/1/3/1/8/131872138/woturikomewej_dubom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483855/normal_600ecd7265ff5.pdfIn PDF document text
    • http://moresukko.ru/94486207599ostd9.pdfIn PDF document text
    • http://podjem2.club/roblox_game_online_free43j7j.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412378/normal_6005fb5d4cb8f.pdfIn PDF document text
    • http://fudoviwil.mywebcommunity.org/mejizun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc76411d-4a32-45eb-94a2-33bb81f5acc7/dobaxegerej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8749ce4f-6363-4225-87da-5d3fabf33c76/15970190285.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4be93ff-4112-4dd3-8a63-cde153969727/how_long_do_dunkin_donuts_munchkins_last.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c40f1207-59cd-4027-9bce-ff77f8f46dae/washing_machine_repair_service_in_bangalore.pdfIn PDF document text
    • http://tipipigi.atwebpages.com/tonetegipinoza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24ef80f0-0911-4676-967a-2693a5f1d53b/35257866802.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e59f781-17b1-441c-99c0-c39d0b2cbac3/95250942235.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_off0000e858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE858 4156 bytes
SHA-256: 3c306e0ec94285d13e87c04bb9d91e20e74eae243bb960c666b01ded030faf74
font_01_sfnt_off0000f685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF685 10788 bytes
SHA-256: b1579bbdfbced9d9c4286c48296064270e2f1ebd9c37c0563c9fb7dcd6957f42

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