Malicious PDF — malware analysis report

Static analysis result for SHA-256 b65a129592e3049c…

MALICIOUS

PDF

77.4 KB Created: 2021-04-01 15:40:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 65272910b9a493eed9dee39b089eb155 SHA-1: b1e4199774291bcb9825c5d6f8b8f1b4d55046ce SHA-256: b65a129592e3049cca98492c7e7afc2e86d790ba223ef9b4c4a8295a45d07bcd
196 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier. It contains a large number of external links, many of which appear to be part of an SEO link farm designed to redirect users. The primary malicious URL identified is https://jumiwimov.ru/wix?keyword=minecraft+factions+bot+commands, which is presented as a lure for free downloads. No scripts were extracted, but the PDF structure and link farm indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jumiwimov.ru/wix?keyword=minecraft+factions+bot+commands PDF link annotation
    • https://webuwoterin.weebly.com/uploads/1/3/4/5/134589655/bdc19d4.pdfIn PDF document text
    • http://fikitenifazela.iblogger.org/60786876848.pdfIn PDF document text
    • http://xubakonuxejebip.iblogger.org/femurapofugemiko.pdfIn PDF document text
    • https://luzusuzure.weebly.com/uploads/1/3/0/7/130775685/15c3405c6945.pdfIn PDF document text
    • https://pixereboxos.weebly.com/uploads/1/3/1/3/131381799/34adce0aa11c.pdfIn PDF document text
    • https://funesovikigaje.weebly.com/uploads/1/3/0/7/130740183/nemit_sotilafo.pdfIn PDF document text
    • https://kixawusufeni.weebly.com/uploads/1/3/4/5/134503631/megedanemefakutona.pdfIn PDF document text
    • https://kifosaxuwaf.weebly.com/uploads/1/3/4/0/134016965/wavemezovuvazo_jexove_miwuroxipigusox_kiroxepofukuve.pdfIn PDF document text
    • https://tenubufaz.weebly.com/uploads/1/3/1/1/131164261/ee36c9c7472.pdfIn PDF document text
    • https://bapajoronugenig.weebly.com/uploads/1/3/4/2/134234589/luxaloniver.pdfIn PDF document text
    • https://zaxefuki.weebly.com/uploads/1/3/5/2/135299090/675273a3.pdfIn PDF document text
    • https://sebimifovuduga.weebly.com/uploads/1/3/5/2/135298708/8642562.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/bajapovogam/pumpkin_sheet_cake_brown_butter_frosting.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/palau_musica_catalana_guided_tour_tickets.pdfIn PDF document text
    • https://c9977776-9e37-4432-9eae-e541147807da.filesusr.com/ugd/bb6cc6_469e68427de84c72bec42ad1dc0cb774.pdf?index=trueIn PDF document text
    • https://a001dc82-f31e-4944-9b76-0a8e602b6855.filesusr.com/ugd/e4ee87_3df62a8547c047eaa65d56bd610ba979.pdf?index=trueIn PDF document text
    • https://5e04165b-6ab1-49a6-9937-45006fc2fbeb.filesusr.com/ugd/d19879_58481930f1ce4b33b08efaea9538e0b5.pdf?index=trueIn PDF document text
    • http://bosewavim.rf.gd/free_bible_for_pc_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/50887326799.pdfIn PDF document text
    • https://s3.amazonaws.com/dosipive/96492596369.pdfIn PDF document text
    • https://18cceff7-6d50-42ec-9d85-67184b61345e.filesusr.com/ugd/8c2e83_caa62ad3c19941e5b4d68fb511085df4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/tout_savoir_sur_l_agronomie.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE183 5068 bytes
SHA-256: 43fc3291d4ca99cb22271a20e7b0e07be56f8544f7ed2063d9e8192bb19ba638
font_01_sfnt_off0000f299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF299 11996 bytes
SHA-256: a465bad393f9b263212859c9ab36bb8b458c1b727d831582348ab8e4e6346496
font_02_sfnt_off00011a10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A10 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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