Malicious PDF — malware analysis report

Static analysis result for SHA-256 b980d51c1e7113b5…

MALICIOUS

PDF

80.7 KB Created: 2021-03-03 06:44:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 730c945a468dda5f4fea9f9e59dd0113 SHA-1: 694e40970a9e7f49c55c9476bacd2033d72cbf89 SHA-256: b980d51c1e7113b51b8e5ff0254cd90eba4501074db6a00287eb426c7e151357
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 for 'Pdf.Phishing.Trojan'. The document contains numerous embedded URLs that point to link farms and disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users to malicious 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://bologen.ru/wb?keyword=read%20tintin%20comic%20books%20online%20free PDF link annotation
    • https://cdn.sqhk.co/someteku/ithggj0/18654129570.pdfIn PDF document text
    • http://lipuwisapi.mywebcommunity.org/jiwepiwewotupavirolifuva.pdfIn PDF document text
    • http://siviveko.getenjoyment.net/ryobi_18v_battery_charger_yellow_green_lights.pdfIn PDF document text
    • https://cdn.sqhk.co/wofunukasu/hhxXpid/robot_avengers_full_movie_list.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411935/normal_5ffbc7b81f371.pdfIn PDF document text
    • https://cdn.sqhk.co/goberirud/jeggt9L/elsa_singing_doll_frozen_2_11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503197/normal_600dcfcc2106e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471971/normal_60164dd82e10c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449968/normal_603c5ed72c6af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489428/normal_5ff8a40549b50.pdfIn PDF document text
    • http://xepelewatelaziv.getenjoyment.net/why_is_samsung_washer_not_spinning.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
    • https://s3.amazonaws.com/degagaziv/tepataxewukawub.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/69069965042.pdfIn PDF document text
    • http://ramexizopu.rf.gd/temexuvedis.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/multiplication_grid_worksheet.pdfIn PDF document text
    • http://popofisofol.myartsonline.com/fuxijimusovepurawixu.pdfIn PDF document text
    • http://jemileti.atwebpages.com/41308376081.pdfIn PDF document text
    • http://wigelasipop.rf.gd/10162347889.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/58790396117.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_off0000f23e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23E 5168 bytes
SHA-256: a6f7b5578ea4cbaa1551dd674604de5d228ad20be772f29baf1fd3b867240c59
font_01_sfnt_off000103b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B0 10516 bytes
SHA-256: a1d6c336e2bb938947c64382d4f2aec5e9db9945873cb6cef829025c6ec768c3
font_02_sfnt_off00012787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12787 4324 bytes
SHA-256: ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c

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