Malicious PDF — malware analysis report

Static analysis result for SHA-256 12ada23446957a3a…

MALICIOUS

PDF

76.7 KB Created: 2021-03-10 03:04:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c98e7fe413db3d973d390b020ee59089 SHA-1: c12f1e02dd72a0b9ebcb817149d0fbf18237b866 SHA-256: 12ada23446957a3a50d3e24cb9c47077a6d84f8800344957a67fe0e095a5a50c
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The ML classifier and ClamAV also flagged this file as malicious, strongly suggesting its purpose is to phish for credentials or deliver further malware. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious redirection chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://dafemum.ru/aws?utm_term=magic+tree+house+mummies+and+pyramids+reading+level In PDF document text
    • https://cdn.sqhk.co/fagaluwozez/igixha5/recette_sandwich_poulet_et_canneberge.pdfIn PDF document text
    • http://amsidgi.xyz/41625683681x6s5z.pdfIn PDF document text
    • http://fit-italy.space/jinesofapofr9dl9.pdfIn PDF document text
    • http://dietnatur.fun/travel_agency_marketing_plan_samplep3697.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497646/normal_60278e05c5347.pdfIn PDF document text
    • http://vuvuga.xyz/tusisaxusepimadaie6pm.pdfIn PDF document text
    • http://load-bcp.com/banupi2mjcu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367621/normal_603c70fdd0669.pdfIn PDF document text
    • http://agent-ritual495.online/dell_latitude_e6410_drivers_windows_7_64-bit_free_downloadob6iz.pdfIn PDF document text
    • http://nikaold.site/208927038652oub9.pdfIn PDF document text
    • http://probkin34.xyz/how_to_use_samsung_camera_to_translateafs6m.pdfIn PDF document text
    • http://evilcheats.fun/lixiber2puxs.pdfIn PDF document text
    • http://uber-global.com/infected_ingrown_armpit_hair_picturesqjkmt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419003/normal_5fcff343326ce.pdfIn PDF document text
    • https://cdn.sqhk.co/joxopejufito/cgfjcjf/76227113497.pdfIn PDF document text
    • https://cdn.sqhk.co/vinasujitupe/AifjePr/strategic_leadership_style_test.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/a30906c7-bdc1-4816-8675-3009a1296b24/longman_academic_writing_series_3_paragraphs_to_essays_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f31228d-c047-4164-a55d-161d5e11aaec/nike_air_force_1_love_letter_release_date.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_off0000eb0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0D 5656 bytes
SHA-256: c11bc5ec3ba5140f10dfc0f9e6ea32bfc4715ee0982b308133c9886d63dc7935
font_01_sfnt_off0000fe3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3B 11212 bytes
SHA-256: 4febe17d867e71f8cf27e2d7dae0ee4fac7e42ea8c52606b70204ef5a1931226

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