Malicious PDF — malware analysis report

Static analysis result for SHA-256 41b32c7b292e060d…

MALICIOUS

PDF

79.1 KB Created: 2021-03-17 20:03:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ebecee0ae9bb466e50f39f9ee8014238 SHA-1: 5420efdc98f5bdff9bc1c3e92e53b43177e9ee69 SHA-256: 41b32c7b292e060d8b71b5e01beaf2bec69d27c05b3044b68001cb57b504dce7
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 0.9991

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://maypoin.ru/wix?keyword=ragout+de+boeuf+vin+rouge PDF link annotation
    • https://cdn.sqhk.co/wirowanorax/ejd4ZF6/fukusoj.pdfIn PDF document text
    • http://popotuwilavab.iblogger.org/98016439112.pdfIn PDF document text
    • https://cdn.sqhk.co/pekuwalixeso/iecO5V5/mexawobigemowujekevudizot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489853/normal_5fc62b89977e0.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/9ighjJ9/vinovirijudam.pdfIn PDF document text
    • https://cdn.sqhk.co/jawuraxexije/gjsjilO/24671883231.pdfIn PDF document text
    • http://lefewibek.iblogger.org/country_2_step_rap_song.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446638/normal_60497a8e0ab3b.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
    • http://junixaz.epizy.com/10699005530.pdfIn PDF document text
    • http://bovudizepuxi.epizy.com/45646267314.pdfIn PDF document text
    • https://b01cffea-7a05-49e8-9781-04202a21c04b.filesusr.com/ugd/d5d855_d02824eb5a504d6c9c3ed89444703c4a.pdf?index=trueIn PDF document text
    • http://ribafaga.rf.gd/28900412601.pdfIn PDF document text
    • http://kaguwetu.epizy.com/what_food_not_to_eat_for_flat_belly.pdfIn PDF document text
    • https://2a26c5f8-c4f8-4af8-830b-7e2c9961bd8e.filesusr.com/ugd/2e4362_93324106db084ecea9d474faeed26efe.pdf?index=trueIn PDF document text
    • https://cf176ec6-4820-456b-adf9-61e5f06c968f.filesusr.com/ugd/43d598_cfbeece90f8044be88c0865dfbbe1af7.pdf?index=trueIn PDF document text
    • http://duxuramubot.epizy.com/horse_drawn_carriage_for_sale.pdfIn PDF document text
    • http://zutowuxe.rf.gd/zuviduvejete.pdfIn PDF document text
    • http://womiwinimubejaw.rf.gd/snow_white_and_the_huntsman_names.pdfIn PDF document text
    • https://5ac9d038-517d-4536-97f6-676423289421.filesusr.com/ugd/b444d4_b6a5042d2e70422ea344f815f0464c67.pdf?index=trueIn PDF document text
    • https://aabf49e0-5477-4fd2-8456-a986ef8f2a87.filesusr.com/ugd/9e14ca_5fc979c676174aeba68d32a94c02e530.pdf?index=trueIn PDF document text
    • https://5f384421-c3d0-4b4c-85a6-d3745974446f.filesusr.com/ugd/40006b_da66ad6b515e4391909d9f640c0bffa5.pdf?index=trueIn PDF document text
    • https://46c19374-600d-43be-a5f2-d8bf07c6fddf.filesusr.com/ugd/cc94a4_0f8d4d99fe55452d8b40d2811710f43e.pdf?index=trueIn PDF document text
    • http://kesudakuf.epizy.com/10611287401.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_off0000e834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE834 4956 bytes
SHA-256: f430801e25b0306a3b2065b16288794e4cbfb414a1d3e23ca24b57b9531772cb
font_01_sfnt_off0000f920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF920 12124 bytes
SHA-256: 6919d9f6fac9219244e0d04126ddef7dd2e8e3a75bbc7bc7c909aa9a8d85d2c9
font_02_sfnt_off00011f65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F65 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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