Malicious PDF — malware analysis report

Static analysis result for SHA-256 0086e53bbc706c62…

MALICIOUS

PDF

76.6 KB Created: 2021-03-30 01:54:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 50dfee39afd5ec977d67e0719973c031 SHA-1: 16396ce5193b9394c1b36c277d7b6b2c742704a2 SHA-256: 0086e53bbc706c622f6c9aeacaecbab1369fd0e1879a485c7cf9fc4d0f6cacd0
166 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to disposable domains, suggesting a link farm or phishing lure. The heuristic PDF_RANDOM_URL_LINK specifically flags a link to a PDF hosted on a domain that appears algorithmically generated. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://jacksth.ru/wix?keyword=weight+mass+volume+formula PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4531523/normal_604cde548f868.pdfIn PDF document text
    • http://allieshouseofhope.com/zumisetemu2k726.pdfIn PDF document text
    • http://samettemiz.xyz/1289519745kp0fb.pdfIn PDF document text
    • http://mufutekuson.getenjoyment.net/nijivozonaxulanasofefor.pdfIn PDF document text
    • http://tibudirowe.mygamesonline.org/fasufiwafox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489595/normal_600f5f57bc229.pdfIn PDF document text
    • http://tehnopolis.org/xonefibuvixadijiganuwaguldzumq.pdfIn PDF document text
    • http://salonlabs.xyz/currys_slimline_dishwasher_manualnh3rp.pdfIn PDF document text
    • http://silvanozito.online/vovozuvukudazokariraxotug64n1.pdfIn PDF document text
    • http://znatural.space/zimirelomexidiwevudalet5u9gk.pdfIn PDF document text
    • http://devlp.design/texuwakatola87us2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464297/normal_604da0c45df83.pdfIn PDF document text
    • http://gakawisogafuga.mygamesonline.org/what_is_the_theme_of_the_book_code_talker.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://movuzawizigevej.myartsonline.com/burrows_and_badgers_rules.pdfIn PDF document text
    • http://sopexalibip.onlinewebshop.net/hotel_budgeting_and_forecasting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cab5e25-8b4c-4bfe-8432-e392436c2432/jewulilule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/289a0794-bab5-4ae1-98c3-65b5095c907c/11053110522.pdfIn PDF document text
    • http://dapufojutujat.atwebpages.com/85931643471.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1099e3d3-a6b5-4e26-a0cb-b52943929250/tozexujeseruz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50bd8ff5-a0c0-4d6c-bf63-3016196b718b/defatupuzosimabon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/327c677e-de78-4822-8049-9fb779c41157/61898923387.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_off0000ee4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4B 5252 bytes
SHA-256: 6a448fbdf1cb2da61fa38f7871e4f89d5a5df1f653f364d2aa45ed1f12ea6b2d
font_01_sfnt_off00010011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10011 11016 bytes
SHA-256: cbd76496b250b347ce0c9f8c56beff84c28c6811eb8a6890f24afb7f8644233b

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