Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d8d9831da36720f…

MALICIOUS

PDF

66.0 KB Created: 2021-03-19 03:26:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: c970a8dedb3788da1581e57aad556886 SHA-1: c78d32ffd48364789bca98d8e88e354ab2a5756e SHA-256: 4d8d9831da36720f997f72dd42f7b8f2aa77b1df862e07aea5e183ac7c0a2197
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to 'lozipotod.ru', a domain flagged for malicious activity. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed as a link farm on disposable hosting, reinforcing the phishing or malware distribution intent. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence score suggest a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/wix?keyword=pho+tan+loc+houston PDF link annotation
    • http://duvufiselepeb.22web.org/biology_grade_7.pdfIn PDF document text
    • http://bibivire.mygamesonline.org/5_love_languages_quiz_30_questions.pdfIn PDF document text
    • http://dufebomevun.22web.org/31681733666.pdfIn PDF document text
    • http://sejojus.iblogger.org/vizio_sound_bar_2.1_instructions.pdfIn PDF document text
    • http://jesofafisozosa.iblogger.org/jajarex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://japamitafixe.myartsonline.com/dukuzilokos.pdfIn PDF document text
    • http://femasusatatovet.epizy.com/hindu_college_nagercoil_application_form_2018.pdfIn PDF document text
    • http://dovanudoku.rf.gd/bus_eireann_22_timetable.pdfIn PDF document text
    • http://poxipepeti.epizy.com/megalovania_undertale_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50ed56b6-018e-4615-8465-705ed821bfd5/how_to_learn_to_read_egyptian_hieroglyphs.pdfIn PDF document text
    • http://fomixododib.epizy.com/1060695361.pdfIn PDF document text
    • https://39c10a3a-92c6-412a-a1bb-b8a1fc48fbc4.filesusr.com/ugd/259099_6671618ca3e74351a40772818ea97e82.pdf?index=trueIn PDF document text
    • http://nomekerileme.epizy.com/karijunajosowenexogofemi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a4bb140-7bcc-4cfe-8baf-13c2c3beedd0/zevituxa.pdfIn PDF document text
    • http://wenimawibi.epizy.com/sewuso.pdfIn PDF document text
    • http://raxezebob.rf.gd/1005791464.pdfIn PDF document text
    • https://6ddb26ad-aa8e-4a3e-a925-5cef6fc035e1.filesusr.com/ugd/d3d820_8cb8cc1f343c4c489eab4b6eeb24ae8f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ceaaf08-c923-48fb-bbae-73819166a940/luzexun.pdfIn PDF document text
    • http://piwolimosopobu.myartsonline.com/adobe_acrobat_standard_2020_flatten.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11fcd57f-d28c-4253-8ab0-d39c4f3c756d/how_to_meal_plan_keto.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_off0000c8b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8B3 4792 bytes
SHA-256: 782ed85252573345ead1a89471e690764621bd6672d2358ed52aa9d4e55caba4
font_01_sfnt_off0000d8fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8FC 10404 bytes
SHA-256: 3672627149e4f58437184b90143fbc9b1bf836f978db457a3f12107504283d2a

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