Malicious PDF — malware analysis report

Static analysis result for SHA-256 92d38e15014212d8…

MALICIOUS

PDF

80.7 KB Created: 2021-03-09 11:34:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2abbd2c00f3435c8069c088eacce4395 SHA-1: bd78f50286516ad4e88534c3268ee2f5eb1c0694 SHA-256: 92d38e15014212d872f0a9680714751812728705d6fc4ccfbf63b0b66496dcc3
66 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by 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 0.9998

Heuristics 4

  • 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://jacksth.ru/aws?utm_term=how+do+i+use+maxtor+external+hard+drive PDF link annotation
    • http://edaruzal.xyz/tesowozitotemisagewekixixjfjs.pdfIn PDF document text
    • http://kulinar2020.site/induction_course_templateu1v0u.pdfIn PDF document text
    • http://bupetud.xyz/how_do_you_prime_a_sta_rite_well_pump50ihx.pdfIn PDF document text
    • http://aycotoro0.xyz/motorola_xpr_6550_shoulder_michpmp9.pdfIn PDF document text
    • http://civiliscmq.online/45192020736gh2ny.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484356/normal_5fe64a0530cb1.pdfIn PDF document text
    • http://storefromit.pro/thorax_muscles_functionwodx4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379049/normal_6023d5bac9d63.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501656/normal_5fe5eec3290b4.pdfIn PDF document text
    • http://femetorisufi.sportsontheweb.net/tom_clancy_jack_ryan_jr_series_reading_order.pdfIn PDF document text
    • http://idealicaitalia-official.site/komotigozabejudewufeluzojdqeu.pdfIn PDF document text
    • http://dusejetiwogodad.getenjoyment.net/sudepa.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/277fa4a3-6113-43de-9455-2cf2ceac0f7f/como_rezar_en_familia_la_corona_de_adviento.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/cancellation_of_contract_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2cdc186-9805-466c-bf08-e8be16f7795c/52268550029.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/bacterial_sensitivity_test.pdfIn PDF document text
    • http://duvodix.myartsonline.com/cosco_baby_car_seat_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/961c27a2-ed4e-42f6-91de-233136dc3b07/aroma_food_dehydrator_beef_jerky.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f1cbf06-c57d-48f0-8346-5cfff918dfeb/zoponiwunuzoladuroroxe.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/i_pace_top_speed.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_off0000ff05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF05 5248 bytes
SHA-256: 242de2a816d70a96701875b25166e6d8e5b92547befaa749c33ceee76a5a3e55
font_01_sfnt_off000110bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110BC 10528 bytes
SHA-256: 3db92862e968ecc472ab77e3366b3c11f4b115fd7fdafc70a2d7961677b13e70