Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab6ddb231853a9f4…

MALICIOUS

PDF

76.0 KB Created: 2021-03-19 08:17:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1b2a1bf95ada7f53a768fc62342e410a SHA-1: 9e9608ad6f1dad083b193d661d266cceef62009b SHA-256: ab6ddb231853a9f4e4fe51d7427bc245e64025eccd1cb29aa66b440e9590b8e4
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 0.9991

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://dugedepap.ru/award?keyword=depression+articles+2020+pdf PDF link annotation
    • http://tidedejix.iblogger.org/30650788015.pdfIn PDF document text
    • http://kifopelidito.mypressonline.com/john_deere_455_aws_specs.pdfIn PDF document text
    • http://golixudib.mypressonline.com/muzabufokevugasetireriku.pdfIn PDF document text
    • http://geparup.scienceontheweb.net/56066348111.pdfIn PDF document text
    • http://puzigodemabotod.iblogger.org/vekovil.pdfIn PDF document text
    • http://zanovekolasin.mywebcommunity.org/what_does_firmament_mean_biblically.pdfIn PDF document text
    • http://tulomodev.getenjoyment.net/anet_a8_marlin_configuration.h.pdfIn PDF document text
    • http://nupewijanetari.medianewsonline.com/65190708202.pdfIn PDF document text
    • http://lajodibibodi.getenjoyment.net/area_of_an_open_box.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/814d091b-fc89-4959-b2f1-566d42b5f68d/44833051886.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/143d7433-200e-46d3-a863-c47fc8b7628d/driverack_pa2_software.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30d67b4f-497c-42bd-8fb4-14448d56f391/casio_protrek_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7164632-14ab-43ca-889a-3294ed0d091a/asma_ul_husna_atif_aslam_ringtone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4920da1-d6aa-45b5-9d73-454d0c77d98c/75439835491.pdfIn PDF document text
    • http://kitilogokufalu.atwebpages.com/celestial_hurricanum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb2565b7-0201-4044-bb0a-6cb7cd0a9ed6/what_is_the_passing_score_for_driving_test_in_georgia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/013a7437-6f0b-46ed-8cc7-e15b27ac8f26/who_is_grantor_and_grantee.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5f849c7-5459-4eab-af39-802fde4ff23e/maths_book_for_class_7_maharashtra_board.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32e8f7b0-61d6-409f-b9d8-d7b890ce837c/tipezabexedan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b8df910-066a-4e39-80f7-25fdb12c223e/17112644992.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/964e0b01-43ef-4d0a-894e-3f7fb1ff3912/dololapa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99e2689e-bbe3-467c-9479-dae0213ca0f7/76510210926.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e123288-25f0-4efb-91f1-d7df8a1e7e34/the_heavenly_man_movie.pdfIn PDF document text
    • http://lizugerij.epizy.com/air_masses_and_fronts_review_worksheet_answers.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_off0000e9ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AB 5424 bytes
SHA-256: 5575b423575484ac484b0a491af97ec049ac52b29a4758e528fd4646b0b6ae89
font_01_sfnt_off0000fc30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC30 11152 bytes
SHA-256: f39d7ea4f063e6ceee6640f6a074552577cb5e1c59f4b3c2f9956c5480d74ee6