Malicious PDF — malware analysis report

Static analysis result for SHA-256 49d643baaf74a045…

MALICIOUS

PDF

114.6 KB Created: 2021-04-15 21:10:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3e80f0aab1a043971cdcf9953aebf70e SHA-1: 59931fe92d98c12b6d8aee8c63005ae6b1042086 SHA-256: 49d643baaf74a045f4d22c387b6ca2a1bcfb8bedd15a8bf0ba61cea1d788be0a
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 0.9998

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
  • 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://mezovuduw.ru/strik?utm_term=who+are+the+baudelaires+parents PDF link annotation
    • http://mazanaposiwos.iblogger.org/boost_mobile_australia_apk.pdfIn PDF document text
    • http://stankovit.ru/10000_reasons_ukulele_chords_key_of_c3c4zf.pdfIn PDF document text
    • http://losmopaka.site/galulemavuzefuxatemiwngdna.pdfIn PDF document text
    • https://tuxupifogufo.weebly.com/uploads/1/3/4/5/134594750/9a8e3.pdfIn PDF document text
    • http://juzufezike.mygamesonline.org/lonisoxupifaxu.pdfIn PDF document text
    • http://afracheat4.xyz/28875049984a97d9.pdfIn PDF document text
    • https://wuwexolajux.weebly.com/uploads/1/3/0/8/130814226/701f6adf.pdfIn PDF document text
    • http://sentytld.online/warapiv5mgq.pdfIn PDF document text
    • http://lavka-karamel.ru/805121326451l1j5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7f993087-45f6-41f4-96e5-9dcaca18fb91.filesusr.com/ugd/9a92dd_49b204a58a7142eeb885d078555f9d9d.pdf?index=trueIn PDF document text
    • http://pitigapevede.onlinewebshop.net/73006617210.pdfIn PDF document text
    • https://1ac5d900-0c69-4f12-8b1d-4e209472b8d2.filesusr.com/ugd/828753_d1c42226d3f648599c293e74923b2907.pdf?index=trueIn PDF document text
    • http://newubopuga.epizy.com/kowugovoradodegek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11d1af85-9a19-4816-990e-b0bf827a7fe5/what_is_the_meaning_of_the_title_much_ado_about_nothing.pdfIn PDF document text
    • http://garubokiboja.rf.gd/13773662589.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03133dee-bdbe-462d-9018-e425a4b751ab/scotts_riding_lawn_mower_17hp_42_belt_diagram.pdfIn PDF document text
    • https://ec5c17a1-061e-4a2c-a9e6-b3561ba71229.filesusr.com/ugd/299074_a1d393abefa84f80a17eb410432abaac.pdf?index=trueIn PDF document text
    • http://nefigubisi.epizy.com/wijenaliranopux.pdfIn PDF document text
    • https://587b455d-cc79-4428-8e80-a8b75ce23bca.filesusr.com/ugd/021ec8_1ae7f94c31f046bb8ea5a8a3fc32a2ba.pdf?index=trueIn PDF document text
    • http://jogukazulani.epizy.com/55711283966.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_off00018289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18289 5200 bytes
SHA-256: a77152a69c484cd2d34d8459292924bb2dbbeaad5ff4eb0aeb42206a986d0e7f
font_01_sfnt_off00019434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19434 12036 bytes
SHA-256: d2b8cf99dcc06b2ab63ef7d4918660f5ca98fbf8e66123f2b98897a4ec90c424

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