Malicious PDF — malware analysis report

Static analysis result for SHA-256 bba887206098bc2b…

MALICIOUS

PDF

77.4 KB Created: 2021-04-01 08:16:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d8d6ad9ba24e89ac044887bc30f1e73e SHA-1: 53d5332e8dc7ca08dcb29e02ae1e67d1c9dda549 SHA-256: bba887206098bc2b5090580e54ecfd034a02a675ed89f73e2dba1ee5b4aa9e1c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/award?keyword=haloalkanes+and+haloarenes+class+12+mcq+pdf PDF link annotation
    • https://cdn.sqhk.co/kawinojos/8iaL3ej/neighbours_from_hell_game_online_free.pdfIn PDF document text
    • http://leziwazedo.mypressonline.com/apc_smart_ups_1000_not_turning_on.pdfIn PDF document text
    • https://cdn.sqhk.co/tagisojitilu/8hfibGG/philips_hue_motion_sensor_manual.pdfIn PDF document text
    • http://pimufesijarudiz.22web.org/lavage.pdfIn PDF document text
    • https://cdn.sqhk.co/fabozesemi/PggigrP/zobisivobakovuganebis.pdfIn PDF document text
    • http://rekugegik.scienceontheweb.net/vikediwunuf.pdfIn PDF document text
    • https://cdn.sqhk.co/manuguwe/fiajaic/bojowojavorobopatova.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377113/normal_5fcbdcda14ec2.pdfIn PDF document text
    • http://leporabev.mywebcommunity.org/figapovanifuna.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374181/normal_5fd9dfb22a39b.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://53ebb62d-ddaf-432f-8dc3-1f4746653467.filesusr.com/ugd/bbd3cf_f5656cbd10c742109b34ef9bc04449f3.pdf?index=trueIn PDF document text
    • https://d54d55f4-8004-4613-9f19-7b96cbed0ae7.filesusr.com/ugd/ce4b32_f03a6557ae514ed0ac6974335032265e.pdf?index=trueIn PDF document text
    • http://tigesafapowe.epizy.com/yasin_sharif_download.pdfIn PDF document text
    • https://459fb65c-52af-4c88-885a-43a44fbeaf25.filesusr.com/ugd/6a7407_01f6c9feb9c24caa8f34d0cd6502f1a9.pdf?index=trueIn PDF document text
    • http://nabenejajoko.myartsonline.com/antenatal_care_services.pdfIn PDF document text
    • http://fopagozijudiri.epizy.com/7th_grade_math_brain_teasers_worksheets.pdfIn PDF document text
    • http://zejuruk.rf.gd/pakufadipenome.pdfIn PDF document text
    • http://tupesom.atwebpages.com/vertigo_head_exercises_nhs.pdfIn PDF document text
    • http://korofituzuxigu.onlinewebshop.net/9511884958.pdfIn PDF document text
    • https://c7972686-9310-4d97-8ac3-15e828887225.filesusr.com/ugd/8a419d_36a4baac79d94dd4b86b3fbae1d58b34.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE087 5392 bytes
SHA-256: d53538044d43badd24ab5b6d424159580eb2c42a5f1b3b57e219474b796addca
font_01_sfnt_off0000f29f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29F 11068 bytes
SHA-256: 3dd39c344caec9c4f2e8d3cffa7e396f875f3142cc5610b69808644a4d33d43e
font_02_sfnt_off00011836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11836 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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