Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b02282a5720e333…

MALICIOUS

PDF

92.2 KB Created: 2021-03-27 23:00:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 6bee2de5d76df8a7aa9505c6a3784e91 SHA-1: 19b50871713ebd33893f88689eb67990c0d3e3b0 SHA-256: 9b02282a5720e333430523733f3d28b9f5a36aa6819fca1dda1e55ee37e42be5
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting and forming a link farm, as indicated by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery through these external links. No scripts were extracted, but the structure and URL distribution are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://zajinet.ru/award?keyword=character+design+books+pdf PDF link annotation
    • https://ponatuxo.weebly.com/uploads/1/3/4/5/134596183/2a5efb4.pdfIn PDF document text
    • http://life50it.pro/kwikset_smartcode_914_master_codeccwhq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407086/normal_605a049937708.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368969/normal_603e09e25eb6a.pdfIn PDF document text
    • http://wiinorama.website/tales_from_the_loop_reviews_metacriticv5zoj.pdfIn PDF document text
    • https://vujewixijul.weebly.com/uploads/1/3/1/4/131437312/vulivuz.pdfIn PDF document text
    • http://hidver.com/persuasive_essay_topics_middle_school61ltp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393348/normal_5fef45a1a156b.pdfIn PDF document text
    • https://komomagifagele.weebly.com/uploads/1/3/4/7/134705279/7989339.pdfIn PDF document text
    • http://naturwow.space/74415352269v91oa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388613/normal_6021ecff3552a.pdfIn PDF document text
    • https://samomalekadoj.weebly.com/uploads/1/3/1/4/131438786/natowutadozuber.pdfIn PDF document text
    • https://wolazana.weebly.com/uploads/1/3/0/7/130775510/pidew_zijurejuxop_lulaw_kajevegizibuja.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446275/normal_5fcb03fe239c2.pdfIn PDF document text
    • http://alcexpress1.xyz/refimagozumokoxvpyh.pdfIn PDF document text
    • https://degebemug.weebly.com/uploads/1/3/0/8/130814630/gajagekegofodi-fadolufitut-teluv.pdfIn PDF document text
    • https://wodiwige.weebly.com/uploads/1/3/5/3/135317556/66c995633.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/d7b8d402-cd9d-4e54-addd-acccb2fc0b54/70606234777.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c5ad1c4-bb05-4f92-8c2c-c8d917f47ff3/line_6_pod_hd500x_review_ultimate_guitar.pdfIn PDF document text
    • http://dixuzudes.epizy.com/81481160925.pdfIn PDF document text
    • http://butokerisutu.epizy.com/bienestar_emocional_en_el_trabajo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba3d10da-5c5c-4cf3-b466-27a60ac97ee0/second_language_acquisition_theories_overview_and_evaluation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f655306-f245-4680-9e18-5490361573f4/82782105430.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78fd3c99-1e79-4b9c-b647-3a3ad80cba0a/85154645343.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011c8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C8B 5400 bytes
SHA-256: 70e2c27a82f3cc07d9129bf8ec284ce26a66df7e233f6346605d558b4fa534c9
font_01_sfnt_off00012edc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EDC 11372 bytes
SHA-256: b5c2988c038ce493b41ad8f88bbf6828b3657de5e58b2997cacc806a3557d740
font_02_sfnt_off0001554b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1554B 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333