Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd50a4cbdd7c4b52…

MALICIOUS

PDF

84.3 KB Created: 2021-04-21 12:03:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: dd708e2641fd3d3199ff647403e1e91d SHA-1: 2fed1d3ada1815c73f3a370ebe02e9c2caa5ffe4 SHA-256: dd50a4cbdd7c4b522b0e438796b5453d6246a381977f945e7a9776af4341c169
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 hosting, and is identified as a link farm. The presence of external URIs and the classification as a phishing trojan suggest the document's primary purpose is to redirect users to malicious sites, likely for phishing or malware distribution.

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/strik?utm_term=bengali+love+story+album+gana PDF link annotation
    • http://powerpoint4you.ru/universal_audio_apollo_twin_mkii_quad_usb02zcw.pdfIn PDF document text
    • http://gk-kuban.ru/fubabuqt4p.pdfIn PDF document text
    • http://ewwe.space/25146467418kpfsi.pdfIn PDF document text
    • http://mamontov-net.cc/404420176654x98a.pdfIn PDF document text
    • https://xisulufi.weebly.com/uploads/1/3/4/8/134870666/niwamejuga.pdfIn PDF document text
    • https://likemopulijufo.weebly.com/uploads/1/3/0/7/130739197/dexidatifugol.pdfIn PDF document text
    • http://newipufisatag.scienceontheweb.net/oriflame_catalogue_october_2020.pdfIn PDF document text
    • http://goloszauniver.fun/read_my_thoughts_civet_catzgmce.pdfIn PDF document text
    • https://ropexosuwewi.weebly.com/uploads/1/3/1/3/131380205/10f51574777b5f.pdfIn PDF document text
    • https://riluvozig.weebly.com/uploads/1/3/4/3/134380056/fiwopezusigisuz_winizatum_mavemizuw_witebejalan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454054/normal_6069ec775a8ec.pdfIn PDF document text
    • https://ketowijogi.weebly.com/uploads/1/3/5/9/135985413/7477e0.pdfIn PDF document text
    • http://rolapisi.scienceontheweb.net/81421991265.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476294/normal_5fd6722ddab24.pdfIn PDF document text
    • https://vogovolakufa.weebly.com/uploads/1/3/4/8/134874318/sarugado.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373782/normal_60343d3e5439b.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://xevijojikutep.onlinewebshop.net/attestation_sur_l_honneur_990i_gan.pdfIn PDF document text
    • http://pexirud.onlinewebshop.net/texuwuxaluvej.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/glory_to_hong_kong_piano_music_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/internship_cv_template_word.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF6 5240 bytes
SHA-256: 40858f6b6c43ad464dfa65304091a47d258ec702863f0e92beb8922d1cf10304
font_01_sfnt_off000110ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110BA 10840 bytes
SHA-256: 59c045853165c0ac80a80915754a4d7e85496fb12bb1f4578af468d566b1f62f
font_02_sfnt_off000135d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135D9 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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