Malicious PDF — malware analysis report

Static analysis result for SHA-256 6af8719eb5262dad…

MALICIOUS

PDF

74.5 KB Created: 2021-03-11 15:58:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 759dc393ff2c93e5503e0f4b2e222b48 SHA-1: 3110ddb64526438309358d28f0b4beb4f1c34179 SHA-256: 6af8719eb5262dadaf2f13699a9c7c51578c8f0fa5594d87ad599a87360b877a
126 Risk Score

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 0.9960

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://lozipotod.ru/wix?keyword=sushi+cat+4+the+great+purrade PDF link annotation
    • http://giwitap.getenjoyment.net/dutigoxidezotekerula.pdfIn PDF document text
    • http://pelinebaj.mypressonline.com/noxirexavapaxigalize.pdfIn PDF document text
    • http://wotidoteked.mywebcommunity.org/juriloxi.pdfIn PDF document text
    • https://cdn.sqhk.co/rowemarul/idGhfGD/95696495925.pdfIn PDF document text
    • https://cdn.sqhk.co/lunapolakezo/dp9xpib/free_things_to_do_in_brooklyn_with_toddlers.pdfIn PDF document text
    • https://cdn.sqhk.co/nugopanage/oKbujb2/xolizaxokotiwagezisel.pdfIn PDF document text
    • http://lomigakorak.getenjoyment.net/julagizidaxif.pdfIn PDF document text
    • https://cdn.sqhk.co/xinoxoxojib/jdFXLig/x_plane_10_flight_simulator_mod_apk_revdl.pdfIn PDF document text
    • http://tulomodev.getenjoyment.net/troy_bilt_30_riding_mower_oil_change.pdfIn PDF document text
    • http://fukerijinexin.mygamesonline.org/3343321132.pdfIn PDF document text
    • https://cdn.sqhk.co/dubikureta/4haaihC/servicenow_quick_messages_variables.pdfIn PDF document text
    • http://tevutubiwij.getenjoyment.net/47507086641.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bef89f6e-6323-4b84-ad9d-a44490bfcc4f.filesusr.com/ugd/96768c_0fa6571223284b439ed61d5606ba2328.pdf?index=trueIn PDF document text
    • http://mudedomusakovag.epizy.com/cva_wolf_with_konus_scope_review.pdfIn PDF document text
    • http://dupepoge.onlinewebshop.net/11412746184.pdfIn PDF document text
    • http://jugofave.rf.gd/how_to_prime_a_home_oil_heater.pdfIn PDF document text
    • https://551f0ad2-75d1-4009-b90b-2f3e3e20230b.filesusr.com/ugd/c2bf0a_62c6ae97424e49289f0a33f5b446a944.pdf?index=trueIn PDF document text
    • https://d5e9a058-cbdc-4968-ba72-30cdbf1e36a3.filesusr.com/ugd/9cfd0a_a221572bc5494f26bc1de7b6727e4719.pdf?index=trueIn PDF document text
    • https://37e0f79d-b0c1-4727-b76d-5b759c81288f.filesusr.com/ugd/9c66ff_ca176ddaa2494007a5060aae5fd90ad2.pdf?index=trueIn PDF document text
    • https://9e0ebcba-7e04-41ac-afc6-cfc574163c15.filesusr.com/ugd/6725b5_cb23a0be6dab41bc83bbf1b007368f52.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sasufufa/elementary_autobiography_template.pdfIn PDF document text
    • http://wipadafefuxasi.onlinewebshop.net/19182432933.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/m25_junction_6_traffic_report.pdfIn PDF document text
    • http://lewinozed.atwebpages.com/how_to_use_cool_mist_ultrasonic_humidifier.pdfIn PDF document text
    • http://givimuvupavu.epizy.com/what_are_the_interview_questions_for_marketing_managers.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/causticizing_process.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_off0000e77d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77D 5492 bytes
SHA-256: 5ef2eb4f9606449e84d3717515a701f4dc1e68339f8f9a4d4f4e478629d67793
font_01_sfnt_off0000fa2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2B 10084 bytes
SHA-256: b5d381f670c99cdf5b407ebcd23ce84a0268dd3927eb6311937d97bdac660e2d

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