Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea471e251bcc8a68…

MALICIOUS

PDF

74.4 KB Created: 2021-06-10 00:55:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d659dcd66c44f7c05a78fa6f313b6d33 SHA-1: 04e310e35cac9e4249cb6d7a31546bb82e83b45c SHA-256: ea471e251bcc8a688da99cecea74efe06238cefd7799dde726609ff5af0743e5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with a high-confidence ML classifier and ClamAV detection indicating malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host many links, likely to distribute malicious content or phish users. The primary malicious URL identified is https://irlanc.ru/pbw?utm_term=publish+power+bi+to+report+server.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://irlanc.ru/pbw?utm_term=publish+power+bi+to+report+server PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4488570/normal_5ff283421f9cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465556/normal_5fcb9c5bc8865.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371787/normal_6037e4f080853.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4417128/normal_60b12903f2666.pdfIn PDF document text
    • https://kesizizuju.weebly.com/uploads/1/3/4/3/134384541/9260484.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409619/normal_6048288693d74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484820/normal_6011523d18a36.pdfIn PDF document text
    • https://tetavezodumop.weebly.com/uploads/1/3/4/6/134645623/deb4752d91c14d.pdfIn PDF document text
    • https://lopamazaveseku.weebly.com/uploads/1/3/4/6/134643240/2858598.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463830/normal_600636e0d60e7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wikitaxif.pbworks.com/w/file/fetch/144677535/sea_animals_worksheets_for_preschoolers.pdfIn PDF document text
    • http://mujefapufefi.pbworks.com/f/81931204732.pdfIn PDF document text
    • http://vixasoli.pbworks.com/w/file/fetch/144932721/vip_betting_apk.pdfIn PDF document text
    • http://piwomimagito.pbworks.com/w/file/fetch/144994386/driver_booster_2021_serial.pdfIn PDF document text
    • http://zanopadik.pbworks.com/w/file/fetch/144994743/anjaam_pathira_full_movie_with_english_subtitles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6329fbbe-ee19-4366-8c6a-343ba1691a6d/night_shift_horror_movie_trailer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15c76617-cd55-49d1-b2bf-888273891856/wings_of_fire_book_14_free_download.pdfIn PDF document text
    • http://najapenoz.pbworks.com/f/28810571799.pdfIn PDF document text
    • http://masawumel.pbworks.com/f/pesizabivowazewagojaz.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_off0000e611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE611 4992 bytes
SHA-256: 01be614d58f4840173aae60be3f99f01da4d80775bfb33b4d240733fe36e81ac
font_01_sfnt_off0000f717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF717 11056 bytes
SHA-256: d5f19c055dadd5d2e8692f1d058898366e3a86119c81b257606a165f260cd55b

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