Malicious PDF — malware analysis report

Static analysis result for SHA-256 f106c8a38592915e…

MALICIOUS

PDF

88.3 KB Created: 2021-03-23 09:42:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1f3f51cbb4bda53baa7fa57d32bd376c SHA-1: 7d137cc47a03333e7c425aac3d23050c2aa9f992 SHA-256: f106c8a38592915eef5e6b7ae96e57778fa0ae8589fba722646146e551eb6ca1
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain ('maypoin.ru') that is flagged as a potential phishing or malware distribution point. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a pattern of using disposable hosting for a large number of links, further suggesting malicious intent. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware delivery.

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://maypoin.ru/strik?utm_term=how+to+solve+a+rubik%2527s+cube+step+by+step+easy PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370090/normal_6024c6e01742f.pdfIn PDF document text
    • http://thecet.xyz/wewuletabicb481.pdfIn PDF document text
    • http://niwadeg.mywebcommunity.org/stephen_king_cell_book_summary.pdfIn PDF document text
    • http://sutovuresas.mygamesonline.org/75426677994.pdfIn PDF document text
    • http://badge-verification-center.com/41536661196weivu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490934/normal_60490c26bbdd2.pdfIn PDF document text
    • https://cdn.sqhk.co/folamudoj/ahahiii/webtoon_promo_codes_2020_july.pdfIn PDF document text
    • http://tujukesabegakom.mygamesonline.org/pci_b._pharm_syllabus_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/tekemozuj/Xhcgj4M/vafanorotasazilokanev.pdfIn PDF document text
    • http://esmoney.site/api_platform_no_pagination4jw0w.pdfIn PDF document text
    • http://znatural.space/zimirelomexidiwevudalet5u9gk.pdfIn PDF document text
    • http://nupewijanetari.medianewsonline.com/interior_design_android_app_free_download.pdfIn PDF document text
    • http://tameenegypt.com/alien_artwork_giger6shhn.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://s3.amazonaws.com/xokebore/genemoteze.pdfIn PDF document text
    • http://rivetibixonapaz.myartsonline.com/carnatic_classical_music_book.pdfIn PDF document text
    • http://milebulijulami.onlinewebshop.net/zufizunid.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/72613252867.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/9587579685.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_off00010bf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF6 5156 bytes
SHA-256: 34453c35953240c5b9321a6b0b04723ba7afe2d6e4698df71e63c0e8f2868df6
font_01_sfnt_off00011db4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB4 11884 bytes
SHA-256: 133c771606d890d9b2b93ac742bccdefad66cc1021850945d50850e274e49f11
font_02_sfnt_off00014533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14533 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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