Malicious PDF — malware analysis report

Static analysis result for SHA-256 253e83394235203f…

MALICIOUS

PDF

81.4 KB Created: 2021-04-06 03:28:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: c9a4ca666f075f24056a83b64274022c SHA-1: 2b1a6783c6f4bf025f62672372385f8264d91212 SHA-256: 253e83394235203f8fd0393ef1354b87598ab2c2f61efbe7c9059a5dec6240e6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs, with at least one, 'https://ponafet.ru/aws?utm_term=under+the+banner+of+heaven+pdf', appearing to be a malicious redirector. The presence of a link farm on disposable hosting suggests an attempt to distribute or redirect to malicious content.

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://ponafet.ru/aws?utm_term=under+the+banner+of+heaven+pdf PDF link annotation
    • http://fusobilel.iblogger.org/2008_ford_escape_transmission_fluid_type.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444371/normal_60328eed1b34d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447278/normal_60360a728e4f3.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://nulitapa.rf.gd/electricity_and_magnetism_are_related._true_false.pdfIn PDF document text
    • http://liwapoguxuwuzir.epizy.com/how_to_reset_maintenance_box_epson_l6160.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0528e858-30ee-489d-9096-0775ef17bce9/motorguide_trolling_motor_parts_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/72346077071.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b333618-abb6-4c24-a010-a905f408b0f4/6943856892.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee0a788d-b186-4123-8535-c4aa0df5e7ca/6219208085.pdfIn PDF document text
    • http://segisubab.epizy.com/1968_mustang_automatic_to_manual_conversion.pdfIn PDF document text
    • http://relumewamamit.rf.gd/66693253133.pdfIn PDF document text
    • http://fapetaboxepug.rf.gd/canon_powershot_a520_batterie_wechseln.pdfIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/vetodezoko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e65f6ca7-0d26-4fd9-a850-4233180f4972/cambridge_igcse_chemistry_coursebook_third_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ea2a762-231c-4434-bd15-37165c06ac58/modere_phase_1_menu_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d88774c-d89c-460e-8cb4-aa59930b8aef/american_crochet_stitches_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51cbf53f-5192-4da8-aaf7-f1dc5c9ca229/study_big_data_analytics_in_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/712e17f2-b6a3-4ec3-9e78-5ba58cbec16a/air_conditioning_service_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/5th_grade_math_quiz_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e35f8982-e37a-4226-8236-46b87a3ddd1a/dyson_dc17_absolute_animal_vacuum_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/55109904808.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_off0000f309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF309 4848 bytes
SHA-256: 575034c217340a13dd2d8cb9b57b591521f6878ebcbdc5e1c5240819f0374ce9
font_01_sfnt_off00010377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10377 11188 bytes
SHA-256: 6aa78d087dbc1bb1a1ff170a65312fbef0512c9e319c6d66e299f347c8ea85ee
font_02_sfnt_off000129a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129A1 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c