Malicious PDF — malware analysis report

Static analysis result for SHA-256 0410d226e6c07bfa…

MALICIOUS

PDF

75.4 KB Created: 2021-03-29 04:24:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0f277892e8e527a36d58507a91287d89 SHA-1: 5e5bd78c947efd1914f60139e3b6476567162b5d SHA-256: 0410d226e6c07bfa486253e23c451d67b0771170f0e39cd63bbf46bcea18a8db
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/award?keyword=calendrier+2020+luxembourg+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486367/normal_600a535fef285.pdfIn PDF document text
    • http://pelistens.xyz/86878726360ev21a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405899/normal_6049ba08d8402.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476140/normal_5fff2f7ce444b.pdfIn PDF document text
    • http://sudilufib.getenjoyment.net/4_pics_1_word_7_letter_answers_game_solver.pdfIn PDF document text
    • http://linza.media/ingersoll_rand_air_compressor_ssr-ep15osmfq.pdfIn PDF document text
    • http://goproonly.com/sat_prep_book_ratings9brra.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391636/normal_6019f1e7c3988.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484636/normal_6003704f90dee.pdfIn PDF document text
    • http://jizefuli.22web.org/19133554951.pdfIn PDF document text
    • http://salestore.pro/the_tick_comicquhwh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d73c234d-0e3d-497d-8108-d5659bace061.filesusr.com/ugd/58a813_5f52820c661746399dd97fc3879883d4.pdf?index=trueIn PDF document text
    • http://gizamowamuvo.epizy.com/algebra_1_solving_equations_worksheet.pdfIn PDF document text
    • https://17851959-1482-4b49-8222-7b7b0c628459.filesusr.com/ugd/3cb679_db8364ef0acc490ea28a834b0b6a56fb.pdf?index=trueIn PDF document text
    • https://5634f520-c25d-421d-ab67-3d94505d13cb.filesusr.com/ugd/1b85ab_9a8f10f12f974cd0954cc175fa8e5098.pdf?index=trueIn PDF document text
    • https://c5e26362-acc3-4c40-9db4-ce0cbd355080.filesusr.com/ugd/681527_7b2611904b6a4f7f8104a57c490727cc.pdf?index=trueIn PDF document text
    • https://d1ee23ee-9ccf-45b0-80ef-1e1ff1f657c4.filesusr.com/ugd/9ef0c3_96ea1119c3904917927d30f5de9733e8.pdf?index=trueIn PDF document text
    • http://xidalagep.myartsonline.com/kulos.pdfIn PDF document text
    • https://ef9935f7-a918-44a1-999f-f1d50a45e4a7.filesusr.com/ugd/b463f2_e3e9d46a0025432c8de979eb53af13aa.pdf?index=trueIn PDF document text
    • http://xesidif.epizy.com/hp_officejet_7110_wide_format_network_a3_inkjet_printer_with_wifi.pdfIn PDF document text
    • https://fd7a53fe-11c1-4e60-83ad-ac1bb997268f.filesusr.com/ugd/5cf23b_a30265cda8b34302bc237589767b92fe.pdf?index=trueIn 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_off0000e2c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C2 5568 bytes
SHA-256: 807613ab7e199b292ccf0b3c1c3236614ae64e79207dbd78372d0cf60a51e1f9
font_01_sfnt_off0000f597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF597 13012 bytes
SHA-256: 9ad058d454f30ca8d36789f9c067c82accb0dbdf350b7f7f409013de065dad96

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