Malicious PDF — malware analysis report

Static analysis result for SHA-256 3945b04eb7ab1f33…

MALICIOUS

PDF

82.1 KB Created: 2021-03-06 11:06:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 043b37382e2b6e9dfc5e0abe0073c8c0 SHA-1: d40e16d02fffe10e57a4382d1027848105ba238a SHA-256: 3945b04eb7ab1f3306337b818831ebdf32ce43738bb9d4fa9acfd408c37071b0
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest this malicious intent. The embedded URL 'https://ponafet.ru/wix?keyword=harry+potter+hogwarts+mystery+hack+2020' further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ponafet.ru/wix?keyword=harry+potter+hogwarts+mystery+hack+2020 PDF link annotation
    • https://cdn.sqhk.co/batovafakupo/jijoZhe/knightfall_ar_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373782/normal_60397db6e5c21.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366646/normal_6000f886e04f8.pdfIn PDF document text
    • https://cdn.sqhk.co/leredupodeka/6ijhXgf/unicorn_baby_lullaby_songs_go_to_sleep.pdfIn PDF document text
    • https://cdn.sqhk.co/mivezifov/hjLlIDl/senanoroxofilefid.pdfIn PDF document text
    • https://cdn.sqhk.co/bepesewutu/flBijt3/paper_plane_doodle_step_by_step.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367941/normal_5fe41424e9a9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496605/normal_60411ee23f4e4.pdfIn PDF document text
    • https://cdn.sqhk.co/felolavap/hbJhdKo/23916138142.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370317/normal_5feb2ecb3a440.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/da6e7a8c-5fd7-4d81-b734-ee6fdcb5af50/jofajemoram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c59b7835-df8f-4bc9-acd4-419b1c383921/are_beats_studio_3_better_than_solo_pro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/321d9bc5-2756-4e6e-bfb3-d3b528d2357c/80164567196.pdfIn PDF document text
    • https://5bf49506-6ef1-42f8-8f90-7e3689255fd3.filesusr.com/ugd/8fe1bf_ad90544f2e334d188cd5a980c38fd213.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9983aaf0-452e-4f31-88f2-59686ae6ae48/92449773842.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f744c01-ff27-4f42-bf1b-0cadc08704da/rofulujafozadozutuxezumos.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/44272888265.pdfIn PDF document text
    • https://f405dec1-7f90-4f4c-a861-5286f67d0127.filesusr.com/ugd/ab922d_527d3bba24ce49f3bbbf4f54ab8ab502.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dojonuta/suddenly_it_s_magic_2012_full_movie.pdfIn PDF document text
    • https://828c6a01-da61-4814-986a-f72e64f4f334.filesusr.com/ugd/cdfdba_3f065af8247e48fe9cfa7e64c8aa500e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e31c4644-bed4-4a1b-b42f-47f2b70f0fec/gifevule.pdfIn PDF document text
    • https://aa5f33e9-793b-4807-a257-9eac84d314d0.filesusr.com/ugd/aa57b2_4b967318f5154315aefe1bcae19c36fb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/10c459a7-6cdd-4a87-b3b1-b266e590be0d/60983038900.pdfIn PDF document text
    • https://f4dd034e-00c7-465c-b850-fb2d75accad5.filesusr.com/ugd/769f78_bd18be9e50904d449351ab16d99179cf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5aabdaf4-b970-41e5-b6eb-3f00880b7194/rironisoxokolugokusob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b3230f2-50d2-464d-b28c-d114744b0c5c/52544842461.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_off0000f64a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64A 5440 bytes
SHA-256: b82d1c04ee77add5fb5792b3bc6f8dd6de21a620ec945bd30379bbad562a9029
font_01_sfnt_off000108e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E7 10400 bytes
SHA-256: ab1cc980c1254075daac0ce0b652786d342b7252f30f52364b589cbfd1cb9c14
font_02_sfnt_off00012c79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C79 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f