Malicious PDF — malware analysis report

Static analysis result for SHA-256 76fbab14e9d1c82a…

MALICIOUS

PDF

77.7 KB Created: 2021-03-28 15:13:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 87d59c5e9b3e05d998de1b0e32888053 SHA-1: 97855d20c4aea64097f22e3a217595e680fb9077 SHA-256: 76fbab14e9d1c82a83e9e1c23eef724bd7bb837fc247743491e5aab135f76ac7
184 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/wb?keyword=divina%20commedia%20canto%2010%20inferno%20testo'. This indicates the document's primary purpose is to lure users to this malicious site. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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://yafferge.ru/wb?keyword=divina%20commedia%20canto%2010%20inferno%20testo In PDF document text
    • https://cdn.sqhk.co/neseleko/KHghhfk/colorful_world_foundation.pdfIn PDF document text
    • https://nojabepeteguki.weebly.com/uploads/1/3/4/6/134669956/9717425.pdfIn PDF document text
    • http://ooovseanalizi.ru/resosi6mlo9.pdfIn PDF document text
    • https://cdn.sqhk.co/zolewiko/jalghhi/digital_voice_recorder_for_mac.pdfIn PDF document text
    • https://wadamosemexijep.weebly.com/uploads/1/3/4/4/134434227/07985.pdfIn PDF document text
    • http://karnaval.host/56365713472iiqd5.pdfIn PDF document text
    • https://rijamukomebojo.weebly.com/uploads/1/3/4/5/134585881/wufunevizonaxis-jibunet.pdfIn PDF document text
    • https://gidisapawifo.weebly.com/uploads/1/3/4/6/134611794/lisefogiwogoperezi.pdfIn PDF document text
    • http://misirabul.22web.org/cymera_apk_latest_version.pdfIn PDF document text
    • https://donimafu.weebly.com/uploads/1/3/5/3/135395233/zomunukuj.pdfIn PDF document text
    • https://cdn.sqhk.co/wazotifuk/jpih0Kh/xodanopuwabigetaver.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/90a6bdf7-b8d2-4593-86c5-d6925e27bd03/what_to_bring_to_dmv_knowledge_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae83063e-30dd-46f4-bd4e-c87a36d6e229/logefovilomebabinixef.pdfIn PDF document text
    • http://xuzexotunel.epizy.com/html_learn_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5d04a1a-753b-419f-aa2f-14628766db14/murray_lawn_mower_owners_manual.pdfIn PDF document text
    • http://nunusama.rf.gd/balu_abcdefg_hd_video_songs_free.pdfIn PDF document text
    • https://c8d0f166-86fd-441b-8df5-aa5e6c6c7644.filesusr.com/ugd/f4b3af_81a4edb9148a4a2d96be349f9543455a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6f4ca5a-a4d8-4238-81a3-e45bd64f8437/nusafetevesuv.pdfIn PDF document text
    • https://200ee3fc-349d-4871-b5c3-2c1c69b60476.filesusr.com/ugd/7b00a0_52d90b3700954079b96e563e76c9963e.pdf?index=trueIn PDF document text
    • http://gotenekopibijo.epizy.com/avg_free_voor_android_tablet.pdfIn PDF document text
    • https://a0f1d9c0-ea46-4e0e-9383-d87711d3127f.filesusr.com/ugd/1e3fb7_d4e3c4b68d604aa294615f1ae7e22653.pdf?index=trueIn PDF document text
    • http://tudutov.rf.gd/burkes_beach_surf_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10f8abdb-c02e-4709-acf6-f1ce8da2de5b/zowevabegesoketuvuxawu.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_off0000f042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF042 5388 bytes
SHA-256: 6225c41e6cc7685b0131afdca462801b4eb4166ea20e9df9c1f2a10559b65c73
font_01_sfnt_off00010293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10293 11472 bytes
SHA-256: 9b56427f191ce931fd84bba23eb7e1b3a7de98d85f8fee7dd309854caa7e5e0b