Malicious PDF — malware analysis report

Static analysis result for SHA-256 f40b2e691fbf215e…

MALICIOUS

PDF

72.9 KB Created: 2021-04-05 06:45:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 76d56b4bf2e6c72d1e51b7b954b4956b SHA-1: c4da2d32eecf175d76886aeb13d10c3d6d11a92c SHA-256: f40b2e691fbf215e8a390b5258da5a8dea2881e57b6a60bd311b910887134c7a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable hosting and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

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://golowaki.ru/award?keyword=contemporary+plant+systematics+pdf PDF link annotation
    • http://kogitijupewe.iblogger.org/swim_with_the_sharks_without_being_eaten_alive_summary.pdfIn PDF document text
    • https://nozijuga.weebly.com/uploads/1/3/4/6/134698325/bamipipabiw.pdfIn PDF document text
    • https://serewutedirafam.weebly.com/uploads/1/3/5/3/135339767/desolalejipo_jepezurutaza_visojabiv_kovazegex.pdfIn PDF document text
    • https://cdn.sqhk.co/mogudekusab/fYYCii2/have_string_on_someone_meaning.pdfIn PDF document text
    • http://vepekideku.iblogger.org/vibedevixebew.pdfIn PDF document text
    • http://dugarudewemudo.sportsontheweb.net/66256949195.pdfIn PDF document text
    • https://lejoxenususoja.weebly.com/uploads/1/3/4/4/134497781/xusefumujujerof_tizuzem.pdfIn PDF document text
    • http://rentline.pro/army_aviation_sift_test_study_guideytn5s.pdfIn PDF document text
    • http://motozed.scienceontheweb.net/anticonceptivos_orales.pdfIn PDF document text
    • https://jowujutaxafekul.weebly.com/uploads/1/3/5/3/135348014/bujiwofomevopa.pdfIn PDF document text
    • https://modatubegawaso.weebly.com/uploads/1/3/4/4/134491319/89dcc8620d45.pdfIn PDF document text
    • https://cdn.sqhk.co/titukopano/7izHbhi/247_blinds_discount_voucher_codes.pdfIn PDF document text
    • http://peludofnor.fun/63553268920mxgle.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
    • http://juludiripo.myartsonline.com/norukegepajij.pdfIn PDF document text
    • http://pajamubo.rf.gd/love_yourself_answer_on_spotify.pdfIn PDF document text
    • http://menasore.epizy.com/calvin_klein_boxer_short_size_guide.pdfIn PDF document text
    • http://wivoruremuwun.rf.gd/delonghi_scultura_espresso_machine_manual.pdfIn PDF document text
    • http://satuzolo.epizy.com/58919099201.pdfIn PDF document text
    • http://jatomije.rf.gd/91908981781.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_off0000d1e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E8 5216 bytes
SHA-256: da9d6475f0a05115de8c4745b405f6564f75dfb06041ab47e461abf18ba39c8a
font_01_sfnt_off0000e38f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE38F 10872 bytes
SHA-256: 177ecba201ccf342e17713a29e7435eb4a1dc774c35a9bb66acaf385ca964b13
font_02_sfnt_off00010848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10848 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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