Malicious PDF — malware analysis report

Static analysis result for SHA-256 55c2ddd4f8033a83…

MALICIOUS

PDF

80.0 KB Created: 2021-04-06 13:20:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a64e32a281f184a65f2bb10d65f9c357 SHA-1: 65449f000a4e700bf7cd98089ff7dfc45c4df91f SHA-256: 55c2ddd4f8033a8362840917aeeab7d6bf172f193c9ef52c59531e9c6789df46
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to potentially harmful sites. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution lure, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://fokemale.ru/award?keyword=best+tablet+screen+size+for+reading+pdf PDF link annotation
    • http://fibutogu.mywebcommunity.org/does_thinkorswim_have_renko_charts.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410988/normal_600866c703dff.pdfIn PDF document text
    • http://bosnoslovnoejelaniekupit.xyz/lifipuvefawajokkqya.pdfIn PDF document text
    • http://zelopaqq.xyz/a_single_man_bookgqa7n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480590/normal_6058598c62f69.pdfIn PDF document text
    • http://brumbum2.xyz/main_tera_boyfriend_raabta_song_downloadp1dri.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485568/normal_5fcda64e9564f.pdfIn PDF document text
    • http://trokot-newshop.online/cool_ringtones_for_android_2020156e4.pdfIn PDF document text
    • http://idealica-itufficiale.website/learn_how_to_use_epic_softwareejohb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485448/normal_5fd0b816d5284.pdfIn PDF document text
    • http://damvglaz0.xyz/rewusitoptopmq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491426/normal_6023e2bcdeb93.pdfIn PDF document text
    • http://zovofuti.mygamesonline.org/how_to_make_dunkin_donuts_blueberry_coffee.pdfIn PDF document text
    • http://saudiautoinsurance.com/middle_earth_rangersq6jbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375350/normal_60487269c080f.pdfIn PDF document text
    • http://richteam.site/682771310014jmoc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499282/normal_601bd19e89c9c.pdfIn PDF document text
    • http://suvolupijiro.mygamesonline.org/edema_angioneurotico_tratamiento.pdfIn PDF document text
    • http://bamirajewenexo.medianewsonline.com/periodic_table_in_gujarati_download.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/c7e1f3ef-6ae8-4fde-9d32-8f99c373be71/zutegifizufegugut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db2fd4bf-3e79-4f90-bc64-7e7396ef8659/gutisikerawuvize.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/810c7b98-9cee-4e74-8558-0239fd1b22e3/81632822511.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_off0000f7cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CD 5560 bytes
SHA-256: 070ae73c1f23c0fd9e01832f4b04ed581bc65126e284a086284de30691b9ecca
font_01_sfnt_off00010ad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD0 11160 bytes
SHA-256: 4f798f9165c95f9a4580dd6e0f724009c86fd2e71c77df3221e9589e965e7cba

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