Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cf8719099ba7387…

MALICIOUS

PDF

78.0 KB Created: 2021-06-10 07:09:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 646c260a3cf5b675f4b1b943d07f944f SHA-1: caab84410256885e5674ea4194c3bec8dc0fb0ac SHA-256: 6cf8719099ba7387fbf206064a17822de161e26665d8537a9eecde53c8738320
186 Risk Score

Malware Insights

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

This PDF document was identified as malicious by a machine learning classifier and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. The primary URL, 'https://drafthe.ru/pbw?utm_term=attack+on+titan+2+download+android', indicates a lure related to game downloads.

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://drafthe.ru/pbw?utm_term=attack+on+titan+2+download+android PDF link annotation
    • https://vupudirul.weebly.com/uploads/1/3/0/8/130874586/6078169.pdfIn PDF document text
    • https://pozebukewif.weebly.com/uploads/1/3/4/3/134330137/2ada8.pdfIn PDF document text
    • https://dewosuto.weebly.com/uploads/1/3/1/4/131453399/1239499.pdfIn PDF document text
    • https://pisotojike.weebly.com/uploads/1/3/4/5/134594110/jaginuv.pdfIn PDF document text
    • https://bejuzozomixur.weebly.com/uploads/1/3/5/9/135966319/varas.pdfIn PDF document text
    • https://dodonixufaf.weebly.com/uploads/1/3/1/4/131453867/7783652.pdfIn PDF document text
    • https://nakubinigana.weebly.com/uploads/1/3/1/3/131379761/xerigezuramavaguf.pdfIn PDF document text
    • https://getedizexagan.weebly.com/uploads/1/3/0/7/130740146/bovid-zokanajedowus.pdfIn PDF document text
    • https://wapofaxuza.weebly.com/uploads/1/3/5/9/135992917/xuwuf_jonujozin_kusakosegenevo.pdfIn PDF document text
    • https://lotuliwupufak.weebly.com/uploads/1/3/4/8/134873452/6aac78f84.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://buxozobodu.pbworks.com/f/ejemplos_de_desviacion_estandar_poblacional.pdfIn PDF document text
    • http://mujusevo.pbworks.com/w/file/fetch/144947097/981343496.pdfIn PDF document text
    • http://fodorafirig.pbworks.com/f/pelizakopalipafukorebase.pdfIn PDF document text
    • http://kufujibumufa.pbworks.com/f/letras_de_canciones_cristianas_con_acordes_para_piano.pdfIn PDF document text
    • http://bilabegape.pbworks.com/w/file/fetch/144480267/chhota_bheem_and_krishna_kirmada_full_movie_cartoon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1b27e73-69c0-475e-8054-f668406b82e3/is_the_book_beautiful_disaster_a_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c580793d-4e3a-41df-8b81-e1262b5d52b9/88596675619.pdfIn PDF document text
    • http://kinuwibe.pbworks.com/w/file/fetch/144776490/14132106675.pdfIn PDF document text
    • http://serizedez.pbworks.com/w/file/fetch/144614070/what_is_a_new_mexico_crs_number.pdfIn PDF document text
    • http://lekipirunezi.pbworks.com/w/file/fetch/145011978/toribetel.pdfIn PDF document text
    • http://malamojozag.pbworks.com/w/file/fetch/144665076/rapifom.pdfIn PDF document text
    • http://mokapuv.pbworks.com/f/wandavision_and_dr_strange.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_off0000f5ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EE 5032 bytes
SHA-256: f8ac9f382265dfd951d29aae5179d84b69069394c6dc2e718dcc81b5fac3a287
font_01_sfnt_off00010733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10733 10356 bytes
SHA-256: 3626c072a017aa54d948e9b9af10ec435f541dbe75043f959b9fbb4db6ae9c49