Malicious PDF — malware analysis report

Static analysis result for SHA-256 3383a5ba67c16ed6…

MALICIOUS

PDF

74.4 KB Created: 2021-05-14 21:05:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 63947d1ca2d6fcc4cb2af9c9c94722f3 SHA-1: 5b83f7cd21f1b45ca642fb38c3dd862edb9674f1 SHA-256: 3383a5ba67c16ed64f3f95316a2c0f196d4dc1c6d8f6e3ead7f1e3d6b7e391e4
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://ponafet.ru/strik?utm_term=clack+water+softener+buy PDF link annotation
    • http://tarofolezebinu.iblogger.org/audit_report_of_reliance.pdfIn PDF document text
    • https://nunajamedagafep.weebly.com/uploads/1/3/5/3/135325778/xetifokavi-gogudolej-pojas-ridixufasojudo.pdfIn PDF document text
    • https://vemegerefawobe.weebly.com/uploads/1/3/2/6/132682093/roxirejisopul_xuludakomok_liladisavutakik_zozor.pdfIn PDF document text
    • http://vobemosezo.22web.org/avery_address_label_template_free.pdfIn PDF document text
    • http://zufunepel.iblogger.org/scholastic_dictionary_of_synonyms_antonyms_and_homonyms.pdfIn PDF document text
    • https://fuwamelewupo.weebly.com/uploads/1/3/4/1/134131589/9ded95c2abc9af.pdfIn PDF document text
    • https://kilewesiviteki.weebly.com/uploads/1/3/1/1/131163613/lilewavimilepuv-medabuzewetel-jinixoxanul.pdfIn PDF document text
    • http://ruroraratotu.66ghz.com/kutagofakepo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gasunerumep.rf.gd/florida_durable_power_of_attorney_form.pdfIn PDF document text
    • http://supikovibamukip.epizy.com/clasificacion_tnm_cancer_de_mama_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/757b2d5d-57be-4ece-ba75-3d365a3c65c8/will_cyberpunk_be_fixed_on_ps4.pdfIn PDF document text
    • http://tibepaxun.rf.gd/92594804216.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef7e2ff7-681c-4208-9905-316ca2ae588d/wosikamexolaroduni.pdfIn PDF document text
    • http://norezodo.rf.gd/grade_9_mathematics_platinum_textbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96e4f868-5cd5-4883-ac97-96cb7e9e4ba6/adidas_santiago_watch_white.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ae3aca0-a6d2-49b6-afa4-f2850b7b9d0e/78315385869.pdfIn PDF document text
    • http://bazejufojowopor.epizy.com/arabic_handwriting_font_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f430330-5f95-4bb7-bdd4-1804bd5eb47b/dawubiwuwijibonamuse.pdfIn PDF document text
    • http://fusifovizit.rf.gd/zutidudutusaxalonokuvifor.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_off0000e613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE613 5176 bytes
SHA-256: 03fa6775c6fe615db09ce9b5c130dc734d9bf4e0047d7710e52fc0bbe4d28bdb
font_01_sfnt_off0000f7d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D9 10864 bytes
SHA-256: c48b85e902d3483ffea35ffa004ffc9e07372f4743d48b64f1193acc21f16ed1

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