Malicious PDF — malware analysis report

Static analysis result for SHA-256 eedf58524c61a796…

MALICIOUS

PDF

74.5 KB Created: 2021-04-08 22:28:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: ef20d6542fb3bca8e8bab90b959e04f7 SHA-1: 427009a7ea7fd6442b6ee384c0c218d8d5fc9cf8 SHA-256: eedf58524c61a796c0ec7f2d5649eacd0ccb37b894a213f197dbf3141a565ec1
184 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with at least one identified as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=what+is+the+theme+of+romeo+and+juliet+prologue In PDF document text
    • https://nokajadum.weebly.com/uploads/1/3/4/8/134887388/1994705.pdfIn PDF document text
    • http://jopkapopka.online/sefufesusujarihycg.pdfIn PDF document text
    • http://lnstagramlivesupportcenter.com/essence_anatomy_book_downloadh7qtp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491155/normal_6027e4d6ede26.pdfIn PDF document text
    • http://moshon.space/jojo_siwa_coloring_pages_to_print_freescje9.pdfIn PDF document text
    • https://cdn.sqhk.co/tetolonul/cijhejc/24496287113.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382643/normal_5ff68c364a29f.pdfIn PDF document text
    • https://cdn.sqhk.co/vekokizijam/hLhdJx5/father_s_day_discount_amazon.pdfIn PDF document text
    • https://duvafoxugijotad.weebly.com/uploads/1/3/5/3/135305538/migowitu.pdfIn PDF document text
    • https://nisixokavenofaf.weebly.com/uploads/1/3/4/8/134891603/giwetena.pdfIn PDF document text
    • https://tivafalaxemi.weebly.com/uploads/1/3/0/7/130775521/zokonelujaxilaw_xajubigekasil_sotevarajom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484356/normal_6034573e21c96.pdfIn PDF document text
    • https://befibexa.weebly.com/uploads/1/3/0/9/130969759/tisujaj.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/414923c6-b4dc-4430-975c-471dbe7ca1ce/vonidot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed526ad5-aff4-40be-9335-b516a16d25db/what_is_the_best_color_of_the_year_2021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e6f083f-d9a5-445d-9acc-a90a208f4fd7/tasefifogopojejilagaro.pdfIn PDF document text
    • http://dagimasara.epizy.com/15207728189.pdfIn PDF document text
    • http://rupufunolodul.rf.gd/calistenia_hipertrofia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d67f201-b6ca-4402-bfef-94bbd0b4eede/reflexive_verbs_spanish_list_conjugated.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_off0000e3cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CB 5544 bytes
SHA-256: 001445e87b5bf5c83c9731516afe0b4477701aa96e171297ddb8f2d211967eb9
font_01_sfnt_off0000f68e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68E 11300 bytes
SHA-256: 93abac710a3f0c5648c10c968a53f20e5caed70c5ab7e93cb6ea3bd59e2b51a5

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