Malicious PDF — malware analysis report

Static analysis result for SHA-256 82065bbcbd607a1a…

MALICIOUS

PDF

83.2 KB Created: 2021-03-24 05:51:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7da7d384767205db78b50ff5bd88bd86 SHA-1: 56faec0ef3a94b953e9cd663f8bba558eb0fe9f9 SHA-256: 82065bbcbd607a1a82831a5d9868892d788b80d663669ea1946ba22874a38a09
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 0.9996

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=athlean+x+training+program+free+pdf PDF link annotation
    • http://sweetygirl.club/159793591088s9lb.pdfIn PDF document text
    • http://pressit.fun/briggs_and_stratton_pressure_washer_carburetor_rebuild_kitqudz4.pdfIn PDF document text
    • http://tulomodev.getenjoyment.net/whirlpool_certified_repair_near_me.pdfIn PDF document text
    • http://fukiwurezopukof.mywebcommunity.org/58185150384.pdfIn PDF document text
    • http://demask.fun/kawavevivilepelugezumupaqb347.pdfIn PDF document text
    • http://tufodudem.mypressonline.com/usha_ceiling_fan_price_list_2020.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://zitadufafasid.onlinewebshop.net/77794822387.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dd4bbe9-18a0-4dfa-8932-87a7c3c4bcce/xukebew.pdfIn PDF document text
    • http://lowevetefevug.rf.gd/12298762244.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d3e512b-8ecc-450b-ab88-6e2c25bf77c5/the_book_of_jasher_audio_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dee8c54-30bd-4647-90b2-8595998689ef/44184921380.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/95884940732.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b90c866-242f-4d00-bc80-3a1316b42dca/samsung_galaxy_s6_user_agent.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/lord_of_the_flies_guided_reading_questions_chapter_5.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/areal_af_trekant_formler.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/full_year_calendar_2019_template.pdfIn PDF document text
    • http://zarusorujot.epizy.com/vazotolufusawiza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d687093-60aa-4d0f-ad51-2cabe71aba65/wotat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfb3d6ae-1bbc-4096-af72-5de34a026621/staples_shredder_lockout_key_bypass.pdfIn PDF document text
    • http://jasofulutix.rf.gd/3801968119.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1012b25d-30e2-4485-a66d-194b90a7de71/5_3_bank_mortgage_rates.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_off0000fc69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC69 5124 bytes
SHA-256: 61ce6c4baaa9904a874e497a35ac00ed54c66505062dd5aaab7d20792a2d6923
font_01_sfnt_off00010da3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA3 10268 bytes
SHA-256: 904773cda57aae0a29542b963b8ac13e4f94882071279ffcbca071c8f1b0ecff
font_02_sfnt_off000130d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130D7 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34