Malicious PDF — malware analysis report

Static analysis result for SHA-256 c15dd1a213261bfc…

MALICIOUS

PDF

69.7 KB Created: 2021-05-17 14:52:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5a3b2cd11538b33aeaa5bd0a42a5f070 SHA-1: 99ca3f8d63545ffa5f3fa6303caad5a0a4de11ae SHA-256: c15dd1a213261bfcb2243b0829299777cc278fc014a6585b9d2d90d7574b35c9
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=new+jerome+biblical+commentary+pdf+free+download PDF link annotation
    • https://cdn.sqhk.co/mafowixodi/DpQyihH/26856279227.pdfIn PDF document text
    • https://cdn.sqhk.co/toxotunem/ii5iajf/10775802909.pdfIn PDF document text
    • https://cdn.sqhk.co/rorazelesu/tifaibb/biennial_report_epa.pdfIn PDF document text
    • https://fagowegegex.weebly.com/uploads/1/3/5/3/135315381/foparulewaw-wifemut-kumeguxufunaxa-zunugal.pdfIn PDF document text
    • http://wivuperafuzo.mypressonline.com/pibixajusod.pdfIn PDF document text
    • https://notefusiwedamap.weebly.com/uploads/1/3/4/8/134872173/cc8abed133eda.pdfIn PDF document text
    • https://cdn.sqhk.co/temirikuji/gg9jigf/cute_puppies_pictures_to_draw.pdfIn PDF document text
    • http://juraxoxodas.scienceontheweb.net/your_brain_at_work_david_rock.pdfIn PDF document text
    • https://cdn.sqhk.co/movijomo/cH2NheA/ivern_guide_aram.pdfIn PDF document text
    • https://fefedajukuda.weebly.com/uploads/1/3/1/0/131070841/zikajibomobojuv.pdfIn PDF document text
    • http://ledukamu.iblogger.org/libro_nueva_historia_minima_de_mexico_gratis.pdfIn PDF document text
    • https://cdn.sqhk.co/vibebexez/MhblghY/taledi.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/97e5df6b-233a-4da1-bd7a-9d264ac75a98/what_are_the_best_reusable_nespresso_pods.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd5056e6-804f-4917-9903-71fe3d8e9352/where_can_i_get_a_stray_cat_neutered.pdfIn PDF document text
    • http://kawojimulogizef.rf.gd/fsot_test_example_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e24b54ac-84f5-4158-9bbe-edaeabb5d8e5/cyberpunk_2077_release_steam_time.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21e3438b-aed6-494f-b8ef-a4215927df12/92749657579.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b76f992b-2b86-462d-923a-6f649f91d725/4660008912.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d43b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD43B 5504 bytes
SHA-256: abdb21bb1a7ab60fa4003afd0986a5687d7fef8665ad0f3f559e3addd7187921
font_01_sfnt_off0000e6fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FB 10204 bytes
SHA-256: ead721614a8088b19b54ede5ce73016794eae88a430167e6163bbb7e1eef717f

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