Malicious PDF — malware analysis report

Static analysis result for SHA-256 6608e9917790c48e…

MALICIOUS

PDF

96.3 KB Created: 2021-03-04 14:40:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f63547f56f7ba0845df111b1da02e479 SHA-1: 72686fac7d403c73ace41e76d481d6884c0e14e5 SHA-256: 6608e9917790c48edead0485c52b11093e2dd87ba86b114ac5e617567f0b8e79
184 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. It contains a large number of embedded links, many pointing to disposable hosting and redirector infrastructure, indicating a strong intent to direct users to malicious sites. While no scripts were explicitly extracted, the PDF structure and numerous links suggest a phishing or malware distribution lure, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=what+is+the+timeline+bc+ad In PDF document text
    • https://xomugewobi.weebly.com/uploads/1/3/0/8/130814749/zokaxu-befefibibaxeper-fazit-nofezeba.pdfIn PDF document text
    • https://bewotababuruga.weebly.com/uploads/1/3/1/1/131163836/ea6c0.pdfIn PDF document text
    • http://leopards.space/stellaris_enigmatic_fortress_rewardswew62.pdfIn PDF document text
    • http://maewallace.com/89254556627zxa2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495526/normal_5fdc6c7396b68.pdfIn PDF document text
    • http://003-center.ru/three_unique_things_about_mesy1j5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369786/normal_5fe7bb9e5641f.pdfIn PDF document text
    • https://sajolunuweto.weebly.com/uploads/1/3/1/4/131407571/nebiwig_bosolotuli_nelunoweve.pdfIn PDF document text
    • https://bekazavaf.weebly.com/uploads/1/3/5/3/135327011/xefopufelavoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412592/normal_6020d2ae88a55.pdfIn PDF document text
    • http://visiblawty.com/how_to_use_remote_control_tvm2c7p.pdfIn PDF document text
    • http://55571.ru/akg_p420_microphone_manualnpz41.pdfIn PDF document text
    • http://uptodate.site/34671908128mdc8e.pdfIn PDF document text
    • https://tokegomobox.weebly.com/uploads/1/3/4/3/134314144/5c89238a21a8.pdfIn PDF document text
    • http://bezprovodov.guru/drawing_ideas_for_beginners_easyuxo35.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/723cbbdb-3d84-449c-bdfd-d29391e937c8/what_is_the_oldest_existing_book_in_the_world.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b72ed20-e600-40b2-94dd-f102436f5ced/loser_by_jerry_spinelli_read_aloud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6f76673-05cf-441a-a69f-df01eb6879f9/sig_sauer_sp2022_9mm_30rd_magazine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/064f722c-60a5-4fc6-8742-9ac374b32cc2/polygon_angles_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76b24126-f4e3-4375-b243-35530abd8010/puwefekegijafijuwugezew.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_off00013041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13041 3456 bytes
SHA-256: de9814b747036134b18a53129b8d086b4620b0c6ff081e531b2c2c6b7f2391e2
font_01_sfnt_off00013c97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C97 5236 bytes
SHA-256: 2aade04a68862e73e5a140150a28de0f52a5268eaf62557ebfe2403b1c8b716c
font_02_sfnt_off00014e49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E49 11268 bytes
SHA-256: a1a4eef5b550d7db4237967a10d8eee1903b8d150075d4b673b5897280dd7529