Malicious PDF — malware analysis report

Static analysis result for SHA-256 76f5c2a28b1a277c…

MALICIOUS

PDF

78.1 KB Created: 2021-03-05 05:27:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 4e00add73bfec87e8d6737dd4e5df641 SHA-1: ea5ffda2a844c58874a5819da027a65dcbf0d1c3 SHA-256: 76f5c2a28b1a277c4e27680ecda5fbd3c03ddcffc04d647f8902f4fca311ba25
244 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable hosting, and at least one known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains references to 'Toyota pickup repair manual pdf', suggesting a lure to attract users searching for technical information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=toyota+pickup+repair+manual+pdf In PDF document text
    • http://nosilekexiwot.mywebcommunity.org/zakunexobovavuguworotav.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488604/normal_5fe57af71204f.pdfIn PDF document text
    • https://sixoribena.weebly.com/uploads/1/3/4/8/134848884/dazewuvol_tazexuremebali_mivurakowa.pdfIn PDF document text
    • https://pixasarajesuwov.weebly.com/uploads/1/3/4/6/134688766/jazotukurebodu.pdfIn PDF document text
    • https://rapofureduf.weebly.com/uploads/1/3/1/1/131164295/6e4b38.pdfIn PDF document text
    • http://wogivodugakovek.mygamesonline.org/motorola_mc55_scanner_software.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486521/normal_5fca7a9176d48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471484/normal_600c20925e3d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417315/normal_601d3be616daf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7aff118d-26f6-4d76-9bc9-1838009e7274.filesusr.com/ugd/f80014_20446176016846a182913ca874683836.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7b8570c-0732-45e6-8e7f-ae654e3f5b53/que_es_la_biblia_para_nios_de_segundo_grado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bff3603e-6d40-47f8-9d02-1f078d676c93/how_to_use_a_keurig_mini_plus.pdfIn PDF document text
    • https://95a57b4d-a24c-4412-bd87-88f4f885d252.filesusr.com/ugd/011e4b_8130a647857c4af1906067f6af48ad9f.pdf?index=trueIn PDF document text
    • https://c18d7360-3707-4bf1-9d6f-52ba7510fa17.filesusr.com/ugd/76cb06_dfad97658dc747dd85a4059304744a97.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e170766-cb8f-484d-8b4d-d154772833da/how_to_do_kriya_yoga_breathing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/030a6bf6-db4c-4d07-811f-6a72dbdba5b6/36814146006.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af7ab472-6906-420a-9929-96cb12fb2b23/98790365690.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a44e5548-fcdd-469f-a5be-3dd59a47a393/82566469726.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04c94878-721d-448c-9a0b-73f0110ae1fe/world_war_z_crossplay_game_chat.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_off0000eb6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6A 5240 bytes
SHA-256: 2a1f96252824713cd5e9ef793cc1989c54317943e9e3d3744615d73ec418f632
font_01_sfnt_off0000fd34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD34 14436 bytes
SHA-256: 84881b52e38b4caa6d7f8d8c7193e483cfcfe9e1e444cc4e4c0744546077f6c1