Malicious PDF — malware analysis report

Static analysis result for SHA-256 a48834814cdd02e1…

MALICIOUS

PDF

113.1 KB Created: 2021-03-14 00:37:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6cc029bb1f0f3322c96a88c01b566b7b SHA-1: c7ef8b279342938f6177c007aba825fc67265c42 SHA-256: a48834814cdd02e1fde180525a89ddc8abbc3a902e678780a138e0472ad00440
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://dafemum.ru/award?keyword=iata+alphabet+pdf PDF link annotation
    • https://cdn.sqhk.co/jivomawufem/ihmzHhg/tiger_shroff_all_song_mp3_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449998/normal_60053b6deceff.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwefuxab/FzhamW2/pinout_diagram_of_not_gate.pdfIn PDF document text
    • https://cdn.sqhk.co/vibebexez/uDhbbA5/13698774462.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366028/normal_60146e3143f42.pdfIn PDF document text
    • http://takaweri.mywebcommunity.org/77018837839.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379043/normal_604356eca4090.pdfIn PDF document text
    • http://dosubodanes.mypressonline.com/nazavajik.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/9d831b85-4537-4c14-8bbf-b01c5ab7b7f7/65446930396.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/400c8ec8-08ac-4c15-8fe1-5e60cae877e5/what_are_the_types_of_cv_resume_look_like.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/33352630273.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/jivorugawar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76d83b50-24c1-4abb-99a6-e7f0c4306802/the_experience_economy_book_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/is_breaking_dawn_the_last_twilight_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38476e01-97d7-4abd-bafc-8b91ac676cb6/what_breed_of_cat_is_church_from_pet_sematary_2019.pdfIn PDF document text
    • http://vumamuv.myartsonline.com/2013_ford_f350_service_truck.pdfIn PDF document text
    • http://semowomeso.onlinewebshop.net/westinghouse_timer_instructions_model_tm416.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c178e9e1-3f97-444a-9826-795d20b7f372/jeputetafir.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16022 4932 bytes
SHA-256: 14eb1bde72e326b019873fdf73bdb7a2eaf21a0d6f7adabd88162847dfd96c00
font_01_sfnt_off000170df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170DF 15732 bytes
SHA-256: 4a0daab11d0f1d03c9553a62dbec8f10c677799d63f05f9192b6f11fef1d417e
font_02_sfnt_off0001a0b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A0B1 16116 bytes
SHA-256: d53d347cea387c54c087b2cd85ea94373ed5f2f525a48ba1569850c62da8c160

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