Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd38bc3c175bcef5…

MALICIOUS

PDF

82.8 KB Created: 2021-03-25 04:05:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: e31615100d3342a31771ec8184245070 SHA-1: 688cf084306ec28e03057398d3c5d6f7058ce30b SHA-256: bd38bc3c175bcef52c71dc1b868c4764de8098b47bb52661844c459652519922
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains heuristics indicating it's a link farm on disposable hosting and uses a 'password-protected archive' lure, suggesting it's designed to trick users into downloading malware. The embedded URLs point to suspicious domains, likely serving as download locations for malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://seumenha.ru/wix?keyword=frp+bypass+apk+download+samsung+for+android+%25E2%2580%2593+apk+of+the+day PDF link annotation
    • http://apparentlyopt.com/is_the_canon_pixma_wirelessxrnqi.pdfIn PDF document text
    • http://bilet-pdd.site/how_to_program_bose_remote_to_directv_box8vola.pdfIn PDF document text
    • http://sosyaltakipcipanelin.com/bivarugasidafejmnr73.pdfIn PDF document text
    • http://domifonupesif.iblogger.org/dusufonukebimatejipiw.pdfIn PDF document text
    • http://mists.space/bissell_powerclean_swivel_rewind_pet_upright_vacuum_manualvhxtt.pdfIn PDF document text
    • http://reduslimitaly-official.website/caracteristicas_del_procesador_de_textos_word_perfectf8pci.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490523/normal_6011dadcb661a.pdfIn PDF document text
    • http://vbnmcxz.xyz/35679380751umr6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447916/normal_602065e16eb3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417527/normal_600dec2770a93.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475577/normal_5feb6572bdc3c.pdfIn PDF document text
    • http://sis-paypal.com/cuisinart_fully_automatic_burr_grind_and_brew_instruction_manualmd6t4.pdfIn PDF document text
    • http://startbastar.online/writing_and_editing_for_digital_mediezi56.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://fojiguxojed.epizy.com/ritowul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51673c02-5fbd-4ecb-9dba-7fdc8856d9f1/sorazufakubukumejowesaxun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9874bf4d-5f84-4468-bee7-02a24f0917ae/polaris_trailblazer_250_carb_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/978918be-e4bc-412a-8a98-95ae4503ab1c/tork_1101_timer_motor.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/dremel_tool_price_philippines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2577cd5f-3c5d-4d27-954c-782a10cf7e16/sparks_of_genius_wow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cb0716b-46ae-498a-91ac-a6bfdcd29748/58806538252.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/kabefadopumabepokodedubur.pdfIn PDF document text
    • http://malenezi.epizy.com/xamarin_android_bitmapfactory._decoderesource.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_off0000f2bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BB 5724 bytes
SHA-256: 7642375f349a3fe6429987d8a4660d4c6770306e5b90549ed1f492840882f55e
font_01_sfnt_off00010618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10618 11232 bytes
SHA-256: a464cefe9d16d6486e948ed4cc0703a9afb70957208963a52e17d6c1e79ecc34
font_02_sfnt_off00012c09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C09 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230