Malicious PDF — malware analysis report

Static analysis result for SHA-256 d14e4463154af809…

MALICIOUS

PDF

76.7 KB Created: 2021-06-09 02:57:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 908e9d9cbf6c02c1f5de9095c44d349a SHA-1: e1db353b18b07f8da798f0a479faf1d521f68f4b SHA-256: d14e4463154af809d49f82326a2c8fc81145c6907aa1a3cee98633e4672700e0
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting services, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nomylo.ru/pbw?utm_term=iq+questions+with+answers+in+sinhala PDF link annotation
    • https://pupisisewovafon.weebly.com/uploads/1/3/4/5/134500239/297990.pdfIn PDF document text
    • https://nilezejexi.weebly.com/uploads/1/3/4/7/134737846/2062096.pdfIn PDF document text
    • https://gakubuzavesow.weebly.com/uploads/1/3/0/8/130813888/jubapakapagomaniz.pdfIn PDF document text
    • https://zisafidavilux.weebly.com/uploads/1/3/2/8/132814196/zadudumunox.pdfIn PDF document text
    • https://fogevama.weebly.com/uploads/1/3/1/1/131164507/walusogufete-zagapez.pdfIn PDF document text
    • https://deketonozalupu.weebly.com/uploads/1/3/3/9/133997688/1687137.pdfIn PDF document text
    • https://luradubesi.weebly.com/uploads/1/3/4/4/134486829/jobobenugise-gepuv-rikosukeposob.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/f5a2818c-933b-4dd3-ad8c-f1a5cb376ab3/lavobususajupuzim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/177e3099-f96b-43d4-ab6a-967adb188e43/82891980853.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfffbc58-1615-4a0b-9deb-388a06b500e4/the_collector_2_movie_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75d8f4fc-98e8-4282-8cad-bb5334adf463/93482669025.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94826bf9-9735-47ae-a13f-5abbe84a4d46/88324219393.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4333c3bc-2706-4080-89f8-9fdf599a2508/mejesejasaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12f7730f-c43a-418c-9674-9b01befd7585/best_tai_chi_video_lessons.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2c52d81-ec0f-4e15-97f7-c9a678907912/what_is_the_definition_of_cognitive_therapy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9cfb01f-a982-4296-9259-b241a3f38338/is_harry_potter_and_the_cursed_child_the_8th_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bd61bd4-00e7-4a5a-9b59-031ddaa67c84/renewable_sources_of_energy_investigation_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d4bf751-8a37-469f-b654-4ad78dc08ca5/varinujetilo.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_off0000eacd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACD 4928 bytes
SHA-256: d3d20167a837504329ebdef4241a31f8f28110d7ac2402d9050359efabc5fec2
font_01_sfnt_off0000fba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA0 12224 bytes
SHA-256: c494f4b88598604a3b8e3835af0cd99b79d582dbb697376b15c4173a8df77776