Malicious PDF — malware analysis report

Static analysis result for SHA-256 3239d72918e9ef8e…

MALICIOUS

PDF

92.3 KB Created: 2021-05-11 12:04:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 836fbc8bbdc94fa9b2354cd06080e2ea SHA-1: 3c80c58a7dd07174ee14813f93301331f7112ec2 SHA-256: 3239d72918e9ef8e16a816f507b37da518a1ebe2b80b0051f84c1bfaaaf44997
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 0.9946

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://maypoin.ru/strik?utm_term=myron+mixon+rib+spritz PDF link annotation
    • http://lumolowopixu.iblogger.org/33258497963.pdfIn PDF document text
    • http://cardioactiveufficiale.site/self_reliance_ralph_waldo_emerson_main_idea1xt2w.pdfIn PDF document text
    • http://gufutaca1.xyz/green_room_imdb_parents_guideq64j0.pdfIn PDF document text
    • http://lovechat24.club/alteryx_server_2018._3vuusy.pdfIn PDF document text
    • http://jokerisirefole.22web.org/govajowotodiruvusijokeno.pdfIn PDF document text
    • http://revukajazoweku.22web.org/jebovofamolu.pdfIn PDF document text
    • http://soldatskaya6.ru/tabesuxuzelada9uubz.pdfIn PDF document text
    • http://piguzipudoval.iblogger.org/23764305358.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/c9393099-d790-4a9c-8828-00476bf818ff/25999080153.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02c1586d-5249-4df3-ae1a-b81d5d07ace5/how_long_does_brown_rice_cook_in_a_rice_cooker.pdfIn PDF document text
    • http://fasudum.rf.gd/lol_cho_gath_jungle_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b770d4be-8f54-4a44-8197-5420328c83f2/washington_dc_live_cam_rally.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8854231c-4902-437c-90ae-b9f84d234361/asus_m5a97_r2.0_compatible_gpu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4beb452e-6b17-4331-86b1-dd1ffc850a8b/battery_tender_jr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b51bda7f-35ba-4288-a4cb-0274526fe031/xigolefulelinogegakifilos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71778235-4343-4f98-a0dd-d506e47f6817/fomufufaguda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3ed9fe2-17d1-404d-8914-d42771a7d3b6/solutions_manual_microelectronic_circuits_analysis_and_design_2nd_edition_rashid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/139c4ba6-5177-4c4c-b696-9e864a68d193/psychology_ciccarelli_5th_edition_chapter_1.pdfIn PDF document text
    • http://sufimajedunof.epizy.com/95710068038.pdfIn PDF document text
    • http://rabuxudizuxu.epizy.com/foxtel_tv_guide_tlc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2504fb6-2722-44e4-b7d7-6872d3b2f448/kenmore_dehumidifier_54501_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96a9f7bb-a199-4058-a3ec-36566f5a668b/in_another_country_ernest_hemingway.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d98e5a21-8ad0-49d5-9741-94b9e9712373/sony_wega_tv_flashing_green_light.pdfIn PDF document text
    • http://fafezevasuba.rf.gd/verbier_hiking_map.pdfIn PDF document text
    • http://pojajabekume.epizy.com/geometry_worksheets_10th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21818cf9-4fad-4378-bf16-e6ba709ad10e/the_woman_in_cabin_10_recap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8690a23-3051-47a8-afb6-6b4024a07940/mental_toughness_quotes.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11428 5088 bytes
SHA-256: ba70bf4ca9b90349e86a24f461b855b3f913b3b0cb7c0a7077608617f9e43950
font_01_sfnt_off0001257c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1257C 11960 bytes
SHA-256: 8a4df2e5191ff350e73837251a19a70f069b7535bee916cabc0ff01f27e99325
font_02_sfnt_off00014e6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E6D 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67