Malicious PDF — malware analysis report

Static analysis result for SHA-256 a282253791b16678…

MALICIOUS

PDF

78.6 KB Created: 2021-06-08 06:07:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: c9f4c3324ee2435d476447b7abd154a5 SHA-1: 5fb7c080426fc36c1be2286ff35fe577518a3d01 SHA-256: a282253791b16678a84776d6740ad9012d60a2215faac2d2e9bb7500bedbcce7
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. One prominent URL, 'https://ketchas.ru/pbw?utm_term=crossy+road+unblocked+at+school', appears to be a lure for potentially malicious content. No scripts were extracted, but the PDF structure and numerous external links indicate a malicious intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ketchas.ru/pbw?utm_term=crossy+road+unblocked+at+school PDF link annotation
    • https://walazufa.weebly.com/uploads/1/3/1/3/131383665/momufedonolojik_talobesojuv_tizidifupibinev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450242/normal_604a242a6fc82.pdfIn PDF document text
    • https://pamibatofenowa.weebly.com/uploads/1/3/4/5/134525539/xesakapiwejig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479715/normal_6030990c5af8f.pdfIn PDF document text
    • https://gunulavosaki.weebly.com/uploads/1/3/4/3/134374607/fipodeselajos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412592/normal_5ff7f6e001c24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451210/normal_606b56ce9f972.pdfIn PDF document text
    • https://kitogabizog.weebly.com/uploads/1/3/6/0/136053612/5686337.pdfIn PDF document text
    • https://dalideno.weebly.com/uploads/1/3/5/3/135384103/nirop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424933/normal_5fe0fbdd15647.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
    • https://uploads.strikinglycdn.com/files/d2e9ba38-4b3c-47c2-bbf3-4f460b448707/20965010043.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/473152b1-4002-4c66-8097-bbfcfe3cb604/xijuwoketapegovekinigepu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e1c4eb5-e49b-47e7-85f9-48fa0e413f6b/clr_via_c_5th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ea7db94-d0f2-4409-9495-ee8a32a8f335/fugalojap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87c3ee8d-9a82-43af-a48b-1963c22c0630/why_will_my_tumble_dryer_not_turn_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/521621a0-436c-4c4f-af81-8938fe68135e/law_of_property_act_1925_section_109.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ef637ae-92c1-4bc4-86b8-8cd0f93ed1ba/60132861631.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c1e40fc-663b-4edb-9464-42be28a6d3c2/dapamuxogotoxakuxul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ffb515d-f07b-40ce-92dd-4d4417c5cc80/dieta_doctor_bolio_para_bajar_abdomen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f70e391-e6c7-4db6-921c-a14240c906db/gusoxoteveboko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9dda7c5-dac0-4c2a-879d-a1921cc3b59c/stored_program_controlled_network.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_off0000e7e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E2 5192 bytes
SHA-256: 6e89182e04fd44260bb8149b26e8ecc826a26a11fcbb65169def22ad615a57ff
font_01_sfnt_off0000f985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF985 10728 bytes
SHA-256: 23c8d9bb564ac48b6fd6f8a8a3755e4c75159eaac8d2755a6409372f0758caf3
font_02_sfnt_off00011e3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E3F 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

Open this report in the interactive analyzer, or submit your own file for analysis.