Malicious PDF — malware analysis report

Static analysis result for SHA-256 6010ed27fd645d8a…

MALICIOUS

PDF

83.3 KB Created: 2021-04-16 11:39:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c6c927754f19cbfaa7d21f408fff0ae6 SHA-1: 582ea8b473e24f376c56db2f81a063ba459f6a20 SHA-256: 6010ed27fd645d8a46f9101ea8aaf9532951de661406831782082ba2d0e1b224
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 0.9961

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/strik?utm_term=the+working+poor+invisible+in+america+summary PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424645/normal_6054cb70a7ddb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447267/normal_5fe9ef78476ee.pdfIn PDF document text
    • http://bottlechainworld.com/european_football_championship_2020_scheduletls2h.pdfIn PDF document text
    • https://cdn.sqhk.co/tixunadegu/jiigChh/dude_perfect_overtime.pdfIn PDF document text
    • https://cdn.sqhk.co/fukaxaxod/ggRhggM/99795566781.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480899/normal_60197c7e0fb3c.pdfIn PDF document text
    • http://vanlit.ru/bpo_real_estate_templateotgo2.pdfIn PDF document text
    • https://cdn.sqhk.co/kibutonap/Cgfhhif/fun_things_to_do_in_jacksonville_il.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408177/normal_6067154404660.pdfIn PDF document text
    • https://cdn.sqhk.co/zejejofe/3qhhAz7/merchants_automotive_group_phone_number.pdfIn PDF document text
    • http://astrology-personal.online/right_to_information_act_amendment_2019_upsc14nl0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369524/normal_6000393516c84.pdfIn PDF document text
    • http://usesoda.pro/compare_and_contrast_examples_5th_grade5pgv2.pdfIn PDF document text
    • http://hamlikjorettoop.ru/vizio_e480i-b2_power_supply_board3h5vo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b4d4e33-ce04-4f59-ba50-a4121036b86f/776320211.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94265012-8ba8-444f-a85c-d616f7b04e5c/18051042701.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da000b0c-35ff-4e1e-b230-8ed83d328426/elements_of_programming_interviews_c_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e986fca4-8cdd-428b-8eca-128aba1e28e5/kutenabukakenopumat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ba685ca-3e54-4c91-ba1e-752151d90eca/direct_rule_and_indirect_rule_in_colonialism.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bba39cb3-838a-4bf8-a5d7-7ebcb86a6d4b/how_to_clean_mold_out_of_dr_brown_bottle_warmer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f15c723-6e4e-4220-892e-e76f2dfec317/sketchup_make_vs_pro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d03d9d9-16fc-4b71-9541-2b7db5ff233a/92951316986.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/599162c7-3ca0-4d38-a3e8-cd930cd0d03a/texemegudizoragufof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4dbfcae-77b3-4194-b14f-b12524747051/majestic_gas_fireplace_cleaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1b9b485-841e-41aa-bfb0-26c9a240e0a5/what_to_check_for_when_buying_a_used_car_from_a_dealer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f6e1e3b-3069-43f7-84b8-74f1b5635064/does_uppababy_mesa_ever_go_on_sale.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_off00010740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10740 5756 bytes
SHA-256: 60c5eb6e4a7a0f00ab8b4ebd654e7575c594f07852b68b47f283294ddaadfe91
font_01_sfnt_off00011aca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ACA 10544 bytes
SHA-256: 3f2da6b9e55e8140449584e9672c4a3fa68cbae3909349e089e41125ca7305c5