Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dd37e57e950a09e…

MALICIOUS

PDF

83.5 KB Created: 2021-03-04 13:36:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a7c7a6a33bf7cea30bd012566695e390 SHA-1: 836e71b646a013572a0f4b966669811e2ef6a072 SHA-256: 4dd37e57e950a09ea335915e7b13c358415ca7f99bfd8048a05b504ed5a449c2
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting an attempt to obscure the true malicious destination. The document body, though heavily obfuscated, contains a URL that matches the pattern of a search result, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://botokaw.ru/award?keyword=why+is+my+braun+coffee+maker+not+brewing PDF link annotation
    • https://bodovusinorone.weebly.com/uploads/1/3/5/3/135347185/4478787.pdfIn PDF document text
    • https://cdn.sqhk.co/gowamojon/ihcDknb/macmillan_education_student_download.pdfIn PDF document text
    • http://moitender.org/6226405576280oma.pdfIn PDF document text
    • https://nevajuto.weebly.com/uploads/1/3/2/6/132695651/wokewuzapefoguvofid.pdfIn PDF document text
    • https://nuguviroguzemek.weebly.com/uploads/1/3/1/0/131070089/vapibimiw-nokupoxin-xozibolisijov-rofiriwe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443598/normal_5fcc963242169.pdfIn PDF document text
    • http://lishop.site/129408479185k6fl.pdfIn PDF document text
    • http://instup.xyz/samsung_galaxy_buds_manual7lj66.pdfIn PDF document text
    • http://intekzafast.online/294171883303kirx.pdfIn PDF document text
    • https://cdn.sqhk.co/baxotonad/ggibija/pet_penguin_names_list.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373261/normal_5fef668a2e0b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367925/normal_603c738bdf553.pdfIn PDF document text
    • http://premiumpornclips.com/jakarevifedabefebuejbtf.pdfIn PDF document text
    • https://doxorovovo.weebly.com/uploads/1/3/4/4/134479089/miwexujakisulopa.pdfIn PDF document text
    • https://zajinepimasi.weebly.com/uploads/1/3/2/8/132815118/xojetudilob.pdfIn PDF document text
    • https://cdn.sqhk.co/retagigimusa/dib8Ngg/soccer_online_store_australia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479923/normal_60298a72cdbf2.pdfIn PDF document text
    • http://onlineeshop24.xyz/35335872657z1va6.pdfIn PDF document text
    • https://jojurofi.weebly.com/uploads/1/3/4/6/134666092/bovapasuwibubod-vuperez-jitafurukove-rigoxixi.pdfIn PDF document text
    • https://cdn.sqhk.co/wexazaruko/UjifjdO/wipudaledezom.pdfIn PDF document text
    • https://cdn.sqhk.co/vivepovugeli/d0hgj7O/classic_games_chess_set.pdfIn PDF document text
    • http://cleaner-inn.club/un_vizhigalil_darling_song_karaokem489n.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC89 5556 bytes
SHA-256: 19fed3e9457640879a238a1b406ad3daa3015329bcd0bb461efcd73954a9f3ca
font_01_sfnt_off00010f62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F62 10240 bytes
SHA-256: a34b65037d40a2b580b989c006ff969d4c0c34286736bea88a7fedddc67aa63c
font_02_sfnt_off00013266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13266 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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