Malicious PDF — malware analysis report

Static analysis result for SHA-256 0df64fb516176d8d…

MALICIOUS

PDF

76.7 KB Created: 2021-05-26 14:31:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e01f886e9474a5580d2738310ad7591a SHA-1: c020d7d81a57aa7516c9425fa3f12aa472498508 SHA-256: 0df64fb516176d8d9fe4d7bd41cee266f7eb7c21e64491969020b87ec2502154
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains a large number of external links, many of which are on disposable hosting, and one prominent URL points to a song download lure. The embedded content suggests an attempt to trick users into visiting malicious sites, likely to download further payloads or steal credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/strik?utm_term=balam+pichkari+remix+mp3+song+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4404490/normal_5ff8b3968caa1.pdfIn PDF document text
    • https://mopotiwifatuge.weebly.com/uploads/1/3/0/8/130813373/nogum_vebesonugijebit_widavulan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394062/normal_5ffb4554e9ec7.pdfIn PDF document text
    • https://wibosopepizasu.weebly.com/uploads/1/3/4/3/134332643/sesugofojuxapepiv.pdfIn PDF document text
    • https://wobajaxeme.weebly.com/uploads/1/3/4/3/134350369/niwip.pdfIn PDF document text
    • https://toxavepudu.weebly.com/uploads/1/3/4/6/134634724/710e10c.pdfIn PDF document text
    • https://gagejewepaji.weebly.com/uploads/1/3/4/4/134444149/mitugojob.pdfIn PDF document text
    • https://kosonijuzar.weebly.com/uploads/1/3/5/9/135974682/6273660.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421478/normal_5fd0668ec813a.pdfIn PDF document text
    • https://xugepofu.weebly.com/uploads/1/3/1/3/131383580/4960996.pdfIn PDF document text
    • https://detudonerud.weebly.com/uploads/1/3/4/6/134660859/sowowomu.pdfIn PDF document text
    • https://defiduzumuxel.weebly.com/uploads/1/3/2/6/132682342/gateditip.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486748/normal_5fc9f966c8510.pdfIn PDF document text
    • https://jufoxaju.weebly.com/uploads/1/3/4/4/134489692/seroterazekukufadij.pdfIn PDF document text
    • https://rinuvigilositu.weebly.com/uploads/1/3/4/4/134463450/lidib_kirafakusexozo_lenadize_tituxiju.pdfIn PDF document text
    • https://nusiteraj.weebly.com/uploads/1/3/5/3/135347212/fonudevefonas.pdfIn PDF document text
    • https://medowiwufaj.weebly.com/uploads/1/3/4/4/134480571/mifeniwa-tutizis-kelinanepog.pdfIn PDF document text
    • https://revijokatise.weebly.com/uploads/1/3/3/9/133999222/29d1b5725c14.pdfIn PDF document text
    • https://lenapejasuma.weebly.com/uploads/1/3/4/7/134749539/mexiwusozelogaj_vedofusogar.pdfIn PDF document text
    • https://balolemarivapi.weebly.com/uploads/1/3/5/3/135309218/664718.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473890/normal_606dcfac61dc2.pdfIn PDF document text
    • https://dagazafija.weebly.com/uploads/1/3/1/4/131484603/mokideru.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/295d2b95-22d9-40e9-86f5-e768c07b96bb/latiponuradajegivuwidoja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/750ce373-b9e8-4042-8b8c-7a35fdf7b8e8/what_is_a_climate_specialist.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/394ceddf-e01c-4e74-b0d7-8e9333440799/how_to_learn_surface_area_and_volume_formulas_easily_class_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93d2a93c-09e7-4011-bc10-f938233aa252/bozafatexapemik.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_off0000ebf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF8 6004 bytes
SHA-256: 70aafc5f7e567f9d4d976235faa4f44489199b578fec4db725ff8f0920a56874
font_01_sfnt_off00010054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10054 10736 bytes
SHA-256: 5129b3b27262fec548233539e385b9f1c533b14f80be8c1e41c5495fa377e710

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