Malicious PDF — malware analysis report

Static analysis result for SHA-256 893b3c7731df3043…

MALICIOUS

PDF

68.8 KB Created: 2021-03-10 16:55:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5d0eaba4882f0b5bd034374cf3ff0515 SHA-1: 7a83ebac724b523a98eb258c9306c9c4a435905b SHA-256: 893b3c7731df304335eadb67694cd5cb2a7e16ef47811f70e7e776a9b6864343
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and 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 0.9992

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://bologen.ru/123?utm_term=balakrishna+banjara+songs+dj PDF link annotation
    • https://vinibakuru.weebly.com/uploads/1/3/4/3/134310820/4569595.pdfIn PDF document text
    • https://ravuripuzi.weebly.com/uploads/1/3/5/9/135958818/panix.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/iaSOjcp/best_minecraft_survival_games_servers.pdfIn PDF document text
    • http://xudogiborijum.66ghz.com/wibumuxubaxibati.pdfIn PDF document text
    • https://foramifetutimif.weebly.com/uploads/1/3/5/3/135347605/a310c67.pdfIn PDF document text
    • https://rebasikerebevo.weebly.com/uploads/1/3/4/0/134016880/sapepab-vebuno-telip-gagabalesud.pdfIn PDF document text
    • https://vabijerokajesi.weebly.com/uploads/1/3/4/5/134595953/fokirawanesokapimeku.pdfIn PDF document text
    • https://binigikuvoloxog.weebly.com/uploads/1/3/5/3/135332024/mijawokemafe.pdfIn PDF document text
    • http://jidojagijubu.iblogger.org/gojamuwabikefivixujorig.pdfIn PDF document text
    • https://cdn.sqhk.co/jedugifaxido/fif9Bhi/dancing_arms_ballet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/kototokim/MijhbZd/50059233639.pdfIn PDF document text
    • https://fizilotot.weebly.com/uploads/1/3/6/0/136050642/dibejagegiwati.pdfIn PDF document text
    • https://kufojinelimipi.weebly.com/uploads/1/3/0/7/130776518/23c3308.pdfIn PDF document text
    • https://sazebajamafogi.weebly.com/uploads/1/3/4/2/134265793/wisakatoriki.pdfIn PDF document text
    • https://gilinolejokakis.weebly.com/uploads/1/3/4/6/134632374/4159425.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/6331498.pdfIn PDF document text
    • https://jedidaril.weebly.com/uploads/1/3/4/6/134687024/5dbc9f69ac5.pdfIn PDF document text
    • http://tonalemeketav.66ghz.com/71291864038.pdfIn PDF document text
    • https://cdn.sqhk.co/basinasedu/MhlgeZD/pentagon_kpop_yanan_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://funolowudako.epizy.com/breakup_punjabi_video.pdfIn PDF document text
    • http://nozovov.rf.gd/english_literature_gcse_aqa_revision_guide.pdfIn PDF document text
    • http://xunonevikonog.rf.gd/biodata_format_in_word.pdfIn PDF document text
    • http://beturatigamoli.epizy.com/lebaxufukumonebimefo.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_off0000d01d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD01D 5416 bytes
SHA-256: 136b189467892bf93312f3f51d2af8a943357954c8c7f4c5d2f7685658d56cd5
font_01_sfnt_off0000e286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE286 10252 bytes
SHA-256: 4fd7b8367ac61d46470cfd9e4b9e37fd9de629d649e5bca60fc43b7a6b8fb9f4

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