Malicious PDF — malware analysis report

Static analysis result for SHA-256 52fe69604e624414…

MALICIOUS

PDF

100.6 KB Created: 2021-03-28 19:29:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 6947ba7cf953aabac8156d79dd0a8b6e SHA-1: 941d436300a09317c201280cb007fcd1100352e4 SHA-256: 52fe69604e624414f41c274c844bb46368d281a5080626f55c96a3968bb6afcd
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous external URIs and is identified as a link farm hosted on disposable domains, suggesting a phishing or malware distribution scheme. While no scripts were extracted, the presence of many URLs points to the document's primary function of redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://bologen.ru/123?utm_term=atari+5200.+rom+bios PDF link annotation
    • https://cdn.sqhk.co/ruxuvedije/Hiqhihd/zisusomuwomifewafabada.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379030/normal_603f20fe17c6f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388282/normal_5fced5a73918e.pdfIn PDF document text
    • http://fiwupejebibogu.sportsontheweb.net/ielts_general_writing_task_2_samples.pdfIn PDF document text
    • http://bomisedoxu.mywebcommunity.org/25565391352.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488315/normal_5fe73e1441240.pdfIn PDF document text
    • https://cdn.sqhk.co/rirelolut/t4gdz0U/yellow_book_cover_design.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427506/normal_5fe4919f9f599.pdfIn PDF document text
    • http://bamirajewenexo.medianewsonline.com/crochet_stitch_chart_printable.pdfIn PDF document text
    • https://cdn.sqhk.co/woxemumi/8ibg0is/1338118293.pdfIn PDF document text
    • http://fibutogu.mywebcommunity.org/fitbit_flex_3_review.pdfIn PDF document text
    • http://zaliv2k20wowowowoow.xyz/soccer_spirits_seventh_star_episode_1_sub_indopefjl.pdfIn PDF document text
    • http://stalekost.site/describe_the_importance_of_a_database_management_systemc6nzi.pdfIn PDF document text
    • http://blekrossi.ru/what_are_two_ethical_issues_in_the_hospitality_industryapjen.pdfIn PDF document text
    • http://itslm.fun/kekuseredudibiretamii1ce0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420039/normal_601d13cea7eae.pdfIn PDF document text
    • https://cdn.sqhk.co/xelalizogim/Lgghgqa/46437839576.pdfIn PDF document text
    • https://cdn.sqhk.co/sanozusu/vghihIN/hockey_stick_store_near_me.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://16012499-1299-48b0-8cdd-5f23a7749958.filesusr.com/ugd/fafc38_287dba1290bf4c9a93363e576a096bc1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/tufelubatug.pdfIn PDF document text
    • https://28932ed2-21d9-4123-99cb-fcff0aac4472.filesusr.com/ugd/cc089a_e4586e5338df495b8d229180cacb81c8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ponivotigegepub/characteristics_of_transcendentalism_stemmed_from_romanticism.pdfIn PDF document text
    • https://bc5ba30c-e427-49eb-abc4-9677f18f04c1.filesusr.com/ugd/bcd086_f01a4311ce784b7a872e500545bda696.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000135a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135A3 5356 bytes
SHA-256: 625694ccd54fa1f6aa8055044e33eaaa04b3333358b9ffc3618659de09298ac1
font_01_sfnt_off000147cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147CB 11624 bytes
SHA-256: 8bc19d92e2e6f4856b04c1117a9cb24ec4ccf1b344be181fad99fd3d1fa9bd7c
font_02_sfnt_off00016fb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FB5 16212 bytes
SHA-256: b06bc02ebaacfbd1d075a38cdcec30a32ca7c1a8b9ef3a67d87f05a051c403e3