Malicious PDF — malware analysis report

Static analysis result for SHA-256 07d3fdf3d2319418…

MALICIOUS

PDF

105.4 KB Created: 2021-04-03 17:12:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 6f057d3358590a87dd9dff808983bfab SHA-1: 747bcb2f1283b65ac6e4c641d875e2ad6326724a SHA-256: 07d3fdf3d2319418443cb916573aa73c051cf8a133310d9733672e932cb6902c
126 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous embedded URLs pointing to external domains, many of which are hosted on disposable or link-farm-like structures, suggesting a phishing or malware distribution scheme. The presence of PDF_URI and EMBEDDED_URL heuristics further supports this, indicating the document's intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://baarspo.ru/award?keyword=novos+anticoagulantes+pdf PDF link annotation
    • http://welojesuvarari.iblogger.org/favapigomemusabujese.pdfIn PDF document text
    • http://danupesokel.iblogger.org/wikoboxotinidivuzipiwuruf.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/bgjGjbS/lisifigel.pdfIn PDF document text
    • https://fumitosebajogo.weebly.com/uploads/1/3/0/7/130740118/f3c753ee1b3d51.pdfIn PDF document text
    • https://cdn.sqhk.co/wozovege/bdejbhi/visegotekuxupaboz.pdfIn PDF document text
    • https://cdn.sqhk.co/selugijibix/u9zgiC8/gibatopinujilikasorevu.pdfIn PDF document text
    • https://mitesevutij.weebly.com/uploads/1/3/4/7/134717039/fifogebuxol_jimupupidub.pdfIn PDF document text
    • https://raxiruzaxulam.weebly.com/uploads/1/3/0/7/130738564/gowetefasebiw.pdfIn PDF document text
    • http://sexedate69.site/kanumuramesugevolafiwuge32uuf.pdfIn PDF document text
    • http://euroshopme.site/586933004741t1sh.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/4a2fcc3c-c04c-46f1-8fcb-e7a098fed523/how_to_get_audio_on_elgato_hd60.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c5990f4-9dcf-4858-9171-922d8202e8bb/37017544815.pdfIn PDF document text
    • http://xijewixevav.onlinewebshop.net/rebimasejijozalojotu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6eab194d-c28c-447c-88dc-b6e20a95af95/where_to_donate_maternity_clothes_singapore.pdfIn PDF document text
    • http://polabufu.myartsonline.com/what_is_an_engineering_drawing.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_off00015dec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DEC 5256 bytes
SHA-256: e6324fd652e9e7c25cd10d3754eb29270153ee4d18f516a4a1cb4f2dd598c29d
font_01_sfnt_off00016ff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FF7 12652 bytes
SHA-256: ce35b1ec12e26f1a9c15f7550b2d8898e7d21c3ee167589ae0eac5ec5499d479

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