Malicious PDF — malware analysis report

Static analysis result for SHA-256 458dc14220be3b91…

MALICIOUS

PDF

77.0 KB Created: 2021-03-23 10:22:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: c44b5390fb009801488e05e5d25d4e4d SHA-1: d46f7d0416705980a252ec81d91cb737efebc586 SHA-256: 458dc14220be3b9182c700fb8b3c874b678ea9e695aedf633e8f782a79e8aa73
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external URIs, with one prominent URL leading to a suspicious domain that appears to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

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://resalured.ru/strik?utm_term=we+are+all+completely+beside+ourselves+by+karen+joy+fowler+review PDF link annotation
    • https://silatasetexa.weebly.com/uploads/1/3/1/6/131637876/rejivebudebatuzi.pdfIn PDF document text
    • https://cdn.sqhk.co/ferobisuw/dhdAhci/86236117753.pdfIn PDF document text
    • http://xonibiz.22web.org/breezingforms_joomla_backend.pdfIn PDF document text
    • https://defelidiko.weebly.com/uploads/1/3/1/0/131070982/8715579.pdfIn PDF document text
    • https://gopufiraw.weebly.com/uploads/1/3/4/5/134590690/f9b3994aaaf.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxubefe/kV1vkib/how_to_make_don_t_rush_challenge_videos.pdfIn PDF document text
    • https://semukozev.weebly.com/uploads/1/3/4/4/134493414/zefabizuwizowekunib.pdfIn PDF document text
    • https://cdn.sqhk.co/mivadunoxo/XiejZDq/vixeramevotivalo.pdfIn PDF document text
    • https://cdn.sqhk.co/vixemujomu/7jghiie/migavijuzej.pdfIn PDF document text
    • http://lofuzuwe.22web.org/horror_autotoxicus.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/d44b842b-3de9-4192-ac2e-0a2413b3a562/pazalugodidelijuxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c95dd515-51e7-4f07-a27c-62aec4f6e3d1/42_foxfire_oak_island_nc.pdfIn PDF document text
    • http://golujaxi.epizy.com/ecg_rhythm_cheat_sheet_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/786324dc-7ecd-43a1-8a85-8cdd688ba280/the_shack_book_quotes_with_page_numbers.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/maganosowobajezetogo.pdfIn PDF document text
    • http://topowurarasixe.epizy.com/zuvobunume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8857125-fe32-40aa-b1c0-df81fc49744c/ximoxoweligizowi.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/phase_4_phonics_worksheets_sparklebox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac29b6de-c190-4ff4-80d2-c0591128a7e2/lirulifefil.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/19904512653.pdfIn PDF document text
    • http://jezirateba.rf.gd/how_to_start_a_top_bar_hive.pdfIn PDF document text
    • http://tipopetudigovib.epizy.com/chennai_gana_songs_tamil_free.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_off0000eb22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB22 5848 bytes
SHA-256: 043991677d79147b0c4dd39dcb02518f68e58f428be300e8df7580b7e20258d4
font_01_sfnt_off0000ff18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF18 10844 bytes
SHA-256: b85f76782b987b4d28c591c81588e20cb80e755a62db80f3a578ee90eaa38d17

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