Malicious PDF — malware analysis report

Static analysis result for SHA-256 80dd5d75f3648cd6…

MALICIOUS

PDF

77.5 KB Created: 2021-04-02 04:08:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ce4dae1ca1f4ee058076bde5a10d9a32 SHA-1: c915dac4ea6b7676e0ce69aae2c1089cdc477bb7 SHA-256: 80dd5d75f3648cd6dd31d663c9e043321180b74f0dd9e561486cf85863012dcf
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 embedded URLs, many of which point to disposable domains and are likely used for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xezojetit.ru/award?keyword=botanical+names+of+all+plants+pdf PDF link annotation
    • http://pebunoguge.mygamesonline.org/astronomy_science_book.pdfIn PDF document text
    • http://help-bluebadgecustomer.com/56270630206ikktu.pdfIn PDF document text
    • https://cdn.sqhk.co/xivomojuf/ibhfhdw/79854445998.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486042/normal_60555e2d198f4.pdfIn PDF document text
    • https://cdn.sqhk.co/pivugisaxap/hhePida/stickman_ninja_warrior_the_last_hope_mod_apk.pdfIn PDF document text
    • http://kolagozisil.mywebcommunity.org/can_i_download_movies_onto_a_chromebook.pdfIn PDF document text
    • http://xafesuvorolivig.scienceontheweb.net/4017502948.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462986/normal_603b4e55c82b2.pdfIn PDF document text
    • http://fakixigulidol.mywebcommunity.org/survival_servers_minecraft.pdfIn PDF document text
    • http://topafigo.mypressonline.com/38754580256.pdfIn PDF document text
    • http://businesshelpservice.com/20189311771m6o2y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414331/normal_604e647a2f6f9.pdfIn PDF document text
    • https://cdn.sqhk.co/nomazotesi/jaFieeC/can_you_escape_horror_4_walkthrough.pdfIn PDF document text
    • http://1-bog.ru/glencoe_algebra_1_answer_key_chapter_7s00mt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419628/normal_6029fec0208da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383930/normal_605ef824b7831.pdfIn PDF document text
    • https://cdn.sqhk.co/nilesatu/jhrgdjh/37678329765.pdfIn PDF document text
    • http://nurokojo.mypressonline.com/29199120958.pdfIn PDF document text
    • http://mrshadow.net/805788700663jm8i.pdfIn PDF document text
    • http://jadogaxarabu.mygamesonline.org/raximokux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408479/normal_604f6f86a949e.pdfIn PDF document text
    • http://smirnoff-optic.com/capitulo_25_de_el_guardin_entre_el_centenod7nvm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476767/normal_601ae3ea7e4c3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://futebowa.atwebpages.com/cardiovascular_disease_research.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_off0000f08e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08E 5256 bytes
SHA-256: 6191155c0f1c14c12c085bfa1a5f339355e6632a8a0d939d7083bad95ab316b0
font_01_sfnt_off00010263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10263 11056 bytes
SHA-256: 454195e8b7f535bf6a92079663d0c2b4283007fb23158058971278de7378a6df

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