Malicious PDF — malware analysis report

Static analysis result for SHA-256 09e5328148eae2aa…

MALICIOUS

PDF

72.3 KB Created: 2021-03-21 07:00:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 9a80c3fc16e30b8632d0dad2f2250494 SHA-1: dc46fed8013036c1e0cea9e116c12d1257274cb1 SHA-256: 09e5328148eae2aa6885a9b4974958c9ee54fe6cc1c0e073377a92d8d37716cd
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The embedded content, though heavily obfuscated, suggests an attempt to lure users to a malicious URL like 'https://fokemale.ru/wix?keyword=a+more+perfect+union+test+answers' under the guise of providing test answers. This pattern is consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://fokemale.ru/wix?keyword=a+more+perfect+union+test+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4403131/normal_5ffd6f2b97507.pdfIn PDF document text
    • http://jotositafi.22web.org/hitachi_fridge_review_singapore.pdfIn PDF document text
    • https://resonorur.weebly.com/uploads/1/3/4/8/134874279/0cdc4a7f.pdfIn PDF document text
    • https://kofasarafafe.weebly.com/uploads/1/3/5/3/135390193/dironol-wokivudebewu-duvobobuviko.pdfIn PDF document text
    • http://vulifux.66ghz.com/love_everlasting_2016_full_movie.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412762/normal_5ff24af93c66f.pdfIn PDF document text
    • https://lupamotikodoja.weebly.com/uploads/1/3/1/4/131406453/kapulalurigu_lurur.pdfIn PDF document text
    • https://relugudikovok.weebly.com/uploads/1/3/4/2/134265752/cf7f0a73667e00.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376629/normal_5fcf893405ca7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444852/normal_5fec4264e6b7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476122/normal_603d4202d452e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4779f2f8-a33e-4327-9c78-21ee0bcf4620.filesusr.com/ugd/31bf02_bd8ac2c0cf8d4e3a8239f8de0e1f7cab.pdf?index=trueIn PDF document text
    • https://ebba3e40-d49f-4cc8-b137-373bb1124918.filesusr.com/ugd/384ea4_afe720cfbae94946935108f6fdfa85a7.pdf?index=trueIn PDF document text
    • http://torusopaxoneku.rf.gd/anemia_falciforme_diagnostico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/518ce5d0-aa1f-4b72-9c5b-4ba9ab6cc6b4/ways_to_improve_critical_thinking_skills_in_nursing.pdfIn PDF document text
    • http://vupiwenuwog.epizy.com/kivalopurev.pdfIn PDF document text
    • http://xexasuwoxomiba.rf.gd/manajemen_sumber_daya_manusia_strategis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d280d8cf-db5b-45d7-b747-2c9389e98a16/rt-ac66u_printer_setup.pdfIn PDF document text
    • http://bogetozepopizir.rf.gd/korupalozageluv.pdfIn PDF document text
    • https://50fe66f1-00be-429c-ab6c-57a9f80d6ab9.filesusr.com/ugd/39cb9d_76ae487517fb43cf9eed664100deb151.pdf?index=trueIn PDF document text
    • https://1bf92926-22d0-44a1-94fb-b51843c41cd5.filesusr.com/ugd/762c1a_d9e0c3c549664b8a95fd985a4879aaaf.pdf?index=trueIn PDF document text
    • http://tudegelufer.rf.gd/is_a_muppet_christmas_carol_on_tv_this_year_2019.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_off0000dc6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC6B 5212 bytes
SHA-256: 723b8befa8caecbb61715b225f4e87d0b0be9aafed4e17701eb38c77954b8938
font_01_sfnt_off0000ee23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE23 11048 bytes
SHA-256: 3114d4a834adc4de9b6853b2b394ab505acbff0e97a5b5e0a768ecdcba316525

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