Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ed7d046fece3098…

MALICIOUS

PDF

113.1 KB Created: 2021-06-08 16:30:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 4cd27d098aa4007f713ab85826772c85 SHA-1: 059622d07a8705ea2f91736c6d5d3313185fa31c SHA-256: 0ed7d046fece3098dbc1001b88d376c101e345c85a87a001f1d4f694ed74082f
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://xajibur.ru/123?utm_term=allen+bradley+powerflex+4+manual+pdf+espa%25C3%25B1ol PDF link annotation
    • https://zobujopexa.weebly.com/uploads/1/3/0/9/130969678/nozesosurilas.pdfIn PDF document text
    • https://xorodipilubila.weebly.com/uploads/1/3/5/3/135311864/c2209c.pdfIn PDF document text
    • https://dogamoduxex.weebly.com/uploads/1/3/4/4/134481485/bigozutuf_nekotebamurenol_sajas_mirefakumevo.pdfIn PDF document text
    • https://fejawizekojiwi.weebly.com/uploads/1/3/1/4/131438151/a30bf7.pdfIn PDF document text
    • https://rurujopolobadez.weebly.com/uploads/1/3/4/4/134444805/xomeburit_magug_wazokerurisagig_zerugonotedekak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444622/normal_60270d3c11af9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461202/normal_6019f7a39933d.pdfIn PDF document text
    • https://boretenewur.weebly.com/uploads/1/3/1/4/131453221/8612171.pdfIn PDF document text
    • https://bigakajufejala.weebly.com/uploads/1/3/4/2/134265656/6269370.pdfIn PDF document text
    • https://xalanuxezofoki.weebly.com/uploads/1/3/4/3/134309931/53d98143.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zorisomofi.pbworks.com/w/file/fetch/144545151/what_is_intercession_prayer.pdfIn PDF document text
    • http://kokoxudalux.pbworks.com/w/file/fetch/144420255/33576515858.pdfIn PDF document text
    • http://molitutolu.pbworks.com/f/17315317285.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/752f240a-ab15-4848-9b08-68cb03eb6583/lego_mindstorms_ev4_building_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11a9fe23-5f89-4e81-9c14-b1a566c39d85/what_sd_card_for_samsung_galaxy_tab_a6.pdfIn PDF document text
    • http://xiwitanul.pbworks.com/w/file/fetch/144442953/fetilovinujipexe.pdfIn PDF document text
    • http://wepoline.pbworks.com/w/file/fetch/144696093/kojix.pdfIn PDF document text
    • http://bamedun.pbworks.com/f/rojipug.pdfIn PDF document text
    • http://kolelulu.pbworks.com/w/file/fetch/144562302/plantilla_hoja_de_rifa_de_100_numeros_para_imprimir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/803f4532-cd9a-400d-865f-a5f08e66541a/10381783812.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f614d5f-d7b1-4121-bdb1-c712c5a5020f/printable_chronological_bible_reading_plan_2020.pdfIn PDF document text
    • http://zupelapowi.pbworks.com/w/file/fetch/144630915/catfish_the_tv_show_season_7_episode_38_watch_online.pdfIn PDF document text
    • http://risodige.pbworks.com/w/file/fetch/144832476/41276821030.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0001371f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1371F 17592 bytes
SHA-256: 8f6e2e845ee83bf4596857c5c849a3e57770295a7574096152c89e82c3efa9e9
font_01_sfnt_off00016e57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E57 1684 bytes
SHA-256: 7407005f5b12d6337b35861a966595f8a34319fbb9adfd7e3788bbb79e1af790
font_02_sfnt_off000176ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176AB 5880 bytes
SHA-256: 8ac7d0169655710cff1c8ea6a8b645c305863ac66e4ce153cd4795abf941d019
font_03_sfnt_off00018a74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A74 12084 bytes
SHA-256: b5e242f86ebbc154a90278773a6588c4906b6ef49d65613a2914cf3031abd9b3

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