Malicious PDF — malware analysis report

Static analysis result for SHA-256 15555d92cca0656d…

MALICIOUS

PDF

79.9 KB Created: 2021-03-29 07:54:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 2535407793edf1f9425d5b6aef420513 SHA-1: 64e18d961e0416a9f1ff091d3c0123ae977706c2 SHA-256: 15555d92cca0656dfb5caa91bcdf0c7799ce08df2b0ea431bc797d93b7d2b735
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://bologen.ru/wix?keyword=callisto+guide+ikov PDF link annotation
    • https://cdn.sqhk.co/purorelaz/idpggif/nova_scotia_demand_express_entry_guide_2020.pdfIn PDF document text
    • http://gizovivomiz.getenjoyment.net/celestamine_bula_xarope.pdfIn PDF document text
    • http://nitanupemil.mygamesonline.org/inc_syllabus_for_bsc_nursing_1st_year_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/kexofodatop/i23hdNs/jogarufimodufunanu.pdfIn PDF document text
    • https://cdn.sqhk.co/vipikunowi/idCNCXX/26468700533.pdfIn PDF document text
    • https://cdn.sqhk.co/buzunonoj/dEGyjaW/forex_trading_complete_course_in_urdu.pdfIn PDF document text
    • http://pafowitowa.medianewsonline.com/pdf_to_word_converter_online_free_i_love.pdfIn PDF document text
    • http://tujemet.scienceontheweb.net/public_interest_disclosure_act_1998.pdfIn PDF document text
    • http://jabilevij.mypressonline.com/gazutowunonoba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/petikamov/zojirushi_bb-cec20ba_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/calories_in_arbys_turkey_gyro_no_sauce.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdb74ead-b399-437a-88be-41a618068bc7/jipitol.pdfIn PDF document text
    • http://konomugafal.epizy.com/how_much_water_to_add_to_cook_rice_in_pressure_cooker.pdfIn PDF document text
    • http://bunakakivukutus.epizy.com/zumimizulidufakiniwasagol.pdfIn PDF document text
    • http://bafuwujix.atwebpages.com/95806560488.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc028c99-5f30-4889-ab77-5ec7949d2ae9/speed_queen_dryer_repair_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/archicad_16_library_objects_free.pdfIn PDF document text
    • http://gitojaxekeveki.onlinewebshop.net/prayers_to_break_generational_curses.pdfIn PDF document text
    • http://gixopiv.onlinewebshop.net/20821514704.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84331ca1-26e4-42a9-8079-f418bba0c653/medical_coding_books_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5638c598-9b7b-49a2-83bd-e1a0143134bd/25105909205.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_off0000fc65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC65 4928 bytes
SHA-256: af8d7adbedc0c6ba777ab1a2714164eb1553a05854306ce09aaf624dd27ca29b
font_01_sfnt_off00010d3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D3C 11036 bytes
SHA-256: c5e61ebf0e1a9d1aff31706fd0752cd62c0f3dd05605448f1e31dcd34abacd9c

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