Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e52552fc29a1eaa…

MALICIOUS

PDF

72.6 KB Created: 2021-03-18 05:53:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 72d167d30edc9fbf75721a64f87e0ed1 SHA-1: 5d951712d9a6e8c0bc2347116c4c478eeafe34e6 SHA-256: 1e52552fc29a1eaaee6c24a836a7acf77af2710201c69ca7c69b5d2113c78fe5
126 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous embedded URLs pointing to disposable hosting, suggesting a link farm or phishing lure. The presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest the document's purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://lozipotod.ru/award?keyword=acero+aisi+1020+pdf PDF link annotation
    • http://saniwofixapu.mygamesonline.org/lovabupekigida.pdfIn PDF document text
    • https://cdn.sqhk.co/dozumapufa/bFvmSja/translate_spanish_to_english_using_camera.pdfIn PDF document text
    • https://cdn.sqhk.co/kojetozativ/Jjagfgh/hardy_weinberg_practice_problems_answers.pdfIn PDF document text
    • http://jorowijedo.mywebcommunity.org/how_to_build_a_soccer_field_in_your_backyard.pdfIn PDF document text
    • http://xifadezuzurap.medianewsonline.com/tokemox.pdfIn PDF document text
    • https://cdn.sqhk.co/puwipaneke/ie356FP/easy_chocolate_castle_cake_recipe_without_oven.pdfIn PDF document text
    • https://cdn.sqhk.co/zanaforare/jshbigl/jobseeker_allowance_form_online.pdfIn PDF document text
    • https://cdn.sqhk.co/vorinugobol/jigrZlx/73901347949.pdfIn PDF document text
    • https://cdn.sqhk.co/dipewoduge/idigP3I/mumez.pdfIn PDF document text
    • http://lojuxaga.mywebcommunity.org/writing_skills_1.pdfIn PDF document text
    • https://cdn.sqhk.co/situdejoj/zIgjyig/bejuxe.pdfIn PDF document text
    • http://gafuvufafokujop.sportsontheweb.net/askep_dermatitis_atopik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a80d1d00-9b9f-4118-b2dd-d51ba45ffdac/26643779851.pdfIn PDF document text
    • http://sabiwilurase.atwebpages.com/joindre_des_gratuitement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd4be30c-e09b-4600-88a3-d00bf4680201/6703655233.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9b87a2b-bfec-4450-95b7-ee5f3f06e9b2/zikoragitegomexuta.pdfIn PDF document text
    • http://livirava.atwebpages.com/wahl_super_trimmer_blade_replacement.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/97389198684.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/brush_effect_photoshop_cs3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2fc2877-f86e-455b-82cb-a4adf6716216/moto_g6_play_battery_price.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/19689278571.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_off0000da46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA46 5432 bytes
SHA-256: dd2d49734f1d72e47d897bb8bfd3a0b96daff34c913dc363059b81517b3fd659
font_01_sfnt_off0000ecd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD7 12072 bytes
SHA-256: ce88bb13a69c50d6a266f928e3cb749d8baea4fc8a7a9c23bc291acee738b3a4

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