Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad3b39b0d0990d10…

MALICIOUS

PDF

76.4 KB Created: 2021-03-28 14:23:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 86c5224f6b20de5b2e6b0bd5b2b0b04e SHA-1: 583715f940e8e23c7327918b45667be6bf07d92b SHA-256: ad3b39b0d0990d105c67cd3b886dc1cf9a109ee651ac9724b6db6e39e3ce26d0
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 0.9993

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/123?utm_term=what+kind+of+bond+will+aluminum+form PDF link annotation
    • https://cdn.sqhk.co/xafigozenusu/iBNighh/63655622841.pdfIn PDF document text
    • https://cdn.sqhk.co/bojojiweg/ighjJpA/89490206990.pdfIn PDF document text
    • https://cdn.sqhk.co/salobosemiv/7OrvRXf/economic_uncertainty_definition_business.pdfIn PDF document text
    • https://cdn.sqhk.co/zaperarori/hgvuifp/sunumute.pdfIn PDF document text
    • http://nugiwelajoz.22web.org/auto_body_work_estimate_form.pdfIn PDF document text
    • https://cdn.sqhk.co/matezafun/ijheZJX/94239360261.pdfIn PDF document text
    • http://shoop-fo.ru/cyberpower_1500pfclcd_event_codes9ehjk.pdfIn PDF document text
    • http://sputnews.com/atomic_absorption_spectroscopy_nptelfacgj.pdfIn PDF document text
    • https://cdn.sqhk.co/kovajivika/dDmhi0j/cup_stacking_game_video.pdfIn PDF document text
    • https://cdn.sqhk.co/febowozefu/e7Qklhc/2221980373.pdfIn PDF document text
    • https://cdn.sqhk.co/pejinijew/fONxbsM/fake_gps_location_apple_app.pdfIn PDF document text
    • http://mnogoturov.com/nedijexixuxerobijuxubizeow1kp.pdfIn PDF document text
    • http://pollsexpert.com/1420048746ad7eb.pdfIn PDF document text
    • https://cdn.sqhk.co/sawitofi/fgjidhd/bepijumejowitinagijonas.pdfIn PDF document text
    • http://gopekulodu.22web.org/how_to_say_oh_ok_in_french.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lugetobuzisufa.rf.gd/all_of_me_piano_sheet_music_piano_guys.pdfIn PDF document text
    • http://poramukuwulaji.epizy.com/free_printable_superhero_baby_shower_invitation_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/textview_animation_in_android_github.pdfIn PDF document text
    • http://jasilowesuvus.rf.gd/combiner_deux_fichiers_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/3229332256.pdfIn PDF document text
    • http://xixitaxizowana.epizy.com/car_buying_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/electrical_safety_tips_construction_site.pdfIn PDF document text
    • http://lilufunom.epizy.com/vupasugibo.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBE 5280 bytes
SHA-256: 220d7c9eb26a9a4a6df8cf253083a42d3edba6413c52fc7969c36c2f86aa4963
font_01_sfnt_off0000ff9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9F 10616 bytes
SHA-256: 2f208a1129ddc7e7a970e2a09957dad7a6c2e2d0fe51ec80de9dad6a8c4f2e33

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