Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddfbc81c63979907…

MALICIOUS

PDF

81.8 KB Created: 2021-04-03 22:27:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: ea18bf9f36e347dedaaec62418724484 SHA-1: 0706c5b2982bbce17358e8bbf8efdcf4e2105dd6 SHA-256: ddfbc81c63979907a20169a38c1b7639b6833fc847730f909703367b0e5bd896
126 Risk Score

Malware Insights

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

The PDF was flagged by ML and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting and acting as a link farm, suggesting an attempt to direct users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a strategy of using multiple domains to obscure the final destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://resalured.ru/123?utm_term=fha+streamline+with+appraisal+guidelines PDF link annotation
    • http://adv-workshop.site/29747043572w5dmx.pdfIn PDF document text
    • https://cdn.sqhk.co/jopubelo/fjhaii6/100_meme_song_buttons_memes_soundboards.pdfIn PDF document text
    • http://ig-copyrightviolation.com/cazadores_de_sombras_ciudad_de_hueso_esta_en_netflixmzoke.pdfIn PDF document text
    • http://shoop-fh.ru/ligavivupgxxs.pdfIn PDF document text
    • https://cdn.sqhk.co/vivokunavu/hKgdjjc/australian_f1_tv_coverage_uk.pdfIn PDF document text
    • http://tcerkovniekupola.space/donde_comprar_el_libro_azul_de_autos_usadosyh0ki.pdfIn PDF document text
    • http://front-glass.space/139056883784j7y.pdfIn PDF document text
    • http://dompodklyuch.com/10363826992u0b8b.pdfIn PDF document text
    • http://usacreditmonitoring.info/adobe_creative_cloud_stuck_at_697ptx7.pdfIn PDF document text
    • http://avlto.best/el_poder_de_la_esposa_que_ora_dia_5ax1jq.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/6594df30-cf07-46b8-ae6e-e019b175df57/68955912011.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/funulube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b8f7351-b9a5-4465-b8e6-4a07b79a832a/why_is_my_hvac_not_blowing_cold_air.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f397a18a-d6c9-4a08-889c-4ef278f4ec7e/turesisifi.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/jeketirusefimiriziwevif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae495081-7ce6-4d7c-a328-82c6c52e517b/katulelibiwazobegave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71e66113-ca5d-4480-b6ca-9095bbc56038/ligeresavexosiwapoxekera.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/23481706982.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f974e74d-b2c4-48a7-8995-fb470d1df8d4/what_is_k_alert_on_cobra_radar_detector.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/big_green_egg_grill_for_sale_used.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/67421176413.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_off00010135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10135 5420 bytes
SHA-256: 8dfa21cbc61b52c9b084eca4bb116d91c9e15fc5c190cead3227ddf76a3d18ae
font_01_sfnt_off00011388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11388 11108 bytes
SHA-256: 4701f85abf0f171fe31350e752418f44d1657a509ab0e9b939d6dcda4b80112a

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