Malicious PDF — malware analysis report

Static analysis result for SHA-256 49f244438f0f39d8…

MALICIOUS

PDF

74.7 KB Created: 2021-04-04 16:02:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: a87a0a0c6dc288c11e0146b3d448643a SHA-1: 50bde9982f9a11b6c54481e1d1062c4ea3e6a7a2 SHA-256: 49f244438f0f39d803fc977a014cc24a55cfe2b82fa43095ce087441a6709eda
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs pointing to disposable domains, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the document's structure as a link farm on disposable hosting, reinforcing the phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://vilenefex.ru/aws?utm_term=how+to+adjust+di2+rear+derailleur PDF link annotation
    • https://cdn.sqhk.co/goworonol/pZhLhcM/riwofuxe.pdfIn PDF document text
    • https://cdn.sqhk.co/fuxiwimemo/ibjhide/mgm_grand_detroit_front_desk_phone_number.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465709/normal_60693e000c5da.pdfIn PDF document text
    • http://tesekal.mygamesonline.org/bleach_official_character_book_souls.pdfIn PDF document text
    • http://zanapipok.getenjoyment.net/basic_english_grammar_quiz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451356/normal_5fcf60a828888.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458417/normal_601ad2c3576ad.pdfIn PDF document text
    • https://cdn.sqhk.co/kadefowuvun/Tzhbojh/fishing_report_chokoloskee_florida.pdfIn PDF document text
    • https://cdn.sqhk.co/vijukifezu/f2Zhbq1/33418353409.pdfIn PDF document text
    • https://cdn.sqhk.co/mitugejaxel/ghhc2he/gexogatasuzedivefa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451365/normal_600758223031f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414334/normal_5fcbe70c91faa.pdfIn PDF document text
    • http://lixorajepidil.mygamesonline.org/58534618623.pdfIn PDF document text
    • https://cdn.sqhk.co/sipobufiw/ajbZaCL/82935571646.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416493/normal_6030cfa62b7a0.pdfIn PDF document text
    • https://cdn.sqhk.co/dokukavifig/bUvuM0M/pedifobokulepasozikupu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470409/normal_604a75f0943f1.pdfIn PDF document text
    • http://tejafugap.22web.org/adobe_flash_player_version_11._1_android.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fazobelo.onlinewebshop.net/xolifodupogenikeguzodafu.pdfIn PDF document text
    • http://palenogawufagi.epizy.com/furniture_catalog_design.pdfIn PDF document text
    • http://gikosetopetidun.rf.gd/ielts_task_1_writing_band_descriptors.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_off0000e6fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FC 5080 bytes
SHA-256: b93c19041f8c28de214e3eeb28bc3bd77755b19b17531d3cc5456a609a0a2d63
font_01_sfnt_off0000f861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF861 10388 bytes
SHA-256: e8a062f7d838ea4541d52f5c626d4c9cddb120f8ae9ea831142c5e958ef381dc

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