Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7ce8b988ffd6f28…

MALICIOUS

PDF

76.7 KB Created: 2021-04-25 01:10:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 5efdfc512ebc1e252b500288724d4335 SHA-1: 53acd69aa1976247ab15bd652a0606d63e3529b0 SHA-256: c7ce8b988ffd6f287ea20f6eac2a9a843aca0a28646882e8332c71f8370fc2e6
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a prominent one leading to 'maypoin.ru'. Heuristics indicate it functions as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://maypoin.ru/strik?utm_term=can+human+live+more+than+200+years PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4494681/normal_6037737a7b943.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449779/normal_600a4d1819de6.pdfIn PDF document text
    • https://cdn.sqhk.co/vefusujix/gmrifgf/tiger_shroff_new_song_mp3_download_pagalworld.pdfIn PDF document text
    • https://cdn.sqhk.co/zesojesiwi/haIpGgs/story_maker_story_creator_for_instagram_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/gidenateg/xidhegd/pisefewuwufo.pdfIn PDF document text
    • https://cdn.sqhk.co/zetewexuve/Lpjb0jg/digestive_enzymes_vs_probiotics.pdfIn PDF document text
    • https://cdn.sqhk.co/nilofixogezu/dibDZhd/83647476843.pdfIn PDF document text
    • http://zugasanuko.getenjoyment.net/xiwenopimirap.pdfIn PDF document text
    • https://cdn.sqhk.co/xanuramalu/3hgYii7/brand_management_internship_singapore.pdfIn PDF document text
    • https://cdn.sqhk.co/jinuzekovodi/YYn3geU/figizivejaxulexebaj.pdfIn PDF document text
    • http://kozidozilujivox.getenjoyment.net/simaropexezojisixe.pdfIn PDF document text
    • https://cdn.sqhk.co/vinogusi/jd31ibS/planet_fitness_cancel_membership.pdfIn PDF document text
    • https://cdn.sqhk.co/losomilodip/ijAghTT/3398054590.pdfIn PDF document text
    • https://cdn.sqhk.co/xumelesep/jgqgiO0/zomalu.pdfIn PDF document text
    • http://wivuperafuzo.mypressonline.com/vulvovaginitis_adalah.pdfIn PDF document text
    • https://cdn.sqhk.co/wewuxujudu/geSXii2/54205819496.pdfIn PDF document text
    • https://cdn.sqhk.co/zefafulolit/hcgheii/49919193457.pdfIn PDF document text
    • https://cdn.sqhk.co/kogeledewafo/f4junhf/79376028322.pdfIn PDF document text
    • https://cdn.sqhk.co/lilaxikixo/xBAMjeO/74574909940.pdfIn PDF document text
    • https://cdn.sqhk.co/gobenebovi/hjvhd9d/ikea_desk_legs_with_wheels.pdfIn PDF document text
    • http://bosemefawixuwov.mypressonline.com/10796510079.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446038/normal_5ff145b16d977.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tofujuwo.onlinewebshop.net/kivipurazenu.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_off0000eeab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAB 5264 bytes
SHA-256: 0516aa9506faa31812b01e96a7c998abd7483325c6eeb472fcadfc44c18fc726
font_01_sfnt_off00010068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10068 10912 bytes
SHA-256: 2ae1431970880b9b1f26c756403567094a9afd92fbba7d22c9168da8f977bed5

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