Malicious PDF — malware analysis report

Static analysis result for SHA-256 45e218f29e9d19f2…

MALICIOUS

PDF

81.0 KB Created: 2021-03-11 17:26:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 63573236a76f37c0f20d42661a5645b4 SHA-1: a1abe54382d9044045bef6a5b0eba7b937eb1913 SHA-256: 45e218f29e9d19f255c09216cdf50ae631ca4ec468f5fd42eb28900d0c4f1f9c
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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/award?keyword=guru+graha+stotram+pdf PDF link annotation
    • https://cdn.sqhk.co/soxuvezosapa/iimhgib/84377201815.pdfIn PDF document text
    • https://cdn.sqhk.co/mekurapiw/I8puij0/40939919737.pdfIn PDF document text
    • https://cdn.sqhk.co/bilanogakiw/i9heSXZ/pikunet.pdfIn PDF document text
    • https://cdn.sqhk.co/pasojixaju/2SPjfgd/snake_attack_game_hacked.pdfIn PDF document text
    • https://cdn.sqhk.co/regomesu/D6iff06/chardon_municipal_court_forms.pdfIn PDF document text
    • https://cdn.sqhk.co/bebomopakax/jg3GjiR/bozavorofubumimi.pdfIn PDF document text
    • https://cdn.sqhk.co/zatejurix/Fniasjg/61128676795.pdfIn PDF document text
    • http://xopijodujakik.22web.org/33871878500.pdfIn PDF document text
    • http://gozuzosu.iblogger.org/94084397806.pdfIn PDF document text
    • https://cdn.sqhk.co/nofevemumidu/jdOgdgd/dinapomifepatutopopo.pdfIn PDF document text
    • https://cdn.sqhk.co/jisujesox/70jbNxH/vivaldi_video_extension.pdfIn PDF document text
    • https://cdn.sqhk.co/gitovera/aighaPf/worms_zone._io_voracious_snake_mod_apk.pdfIn PDF document text
    • http://gasomenuza.iblogger.org/12051432542.pdfIn PDF document text
    • http://pupunorip.getenjoyment.net/52615426195.pdfIn PDF document text
    • https://cdn.sqhk.co/wesuwajil/jgg8chj/lenebezajeta.pdfIn PDF document text
    • http://rilomenininun.getenjoyment.net/dunkin_donuts_menu_prices_dozen_donuts.pdfIn PDF document text
    • https://cdn.sqhk.co/nemazuwigumo/ibdggii/gas_meter_reading_crossword.pdfIn PDF document text
    • http://siwivelijutore.medianewsonline.com/all_tags_and_attributes_of_html.pdfIn PDF document text
    • https://cdn.sqhk.co/tuzevawu/blhbjj1/human_resources_manager_salary_range_uk.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://kugukokoner.myartsonline.com/how_to_assemble_the_total_gym_fit.pdfIn PDF document text
    • http://kogopixipinal.epizy.com/misobimoworaxesetigutunis.pdfIn PDF document text
    • http://diwiludoki.rf.gd/cahier_de_recette_fonctionnelle.pdfIn PDF document text
    • http://zikituxepori.epizy.com/walafemexagowowozaludif.pdfIn PDF document text
    • http://notavopanugatog.epizy.com/39051263199.pdfIn PDF document text
    • http://lavaraf.epizy.com/28981914289.pdfIn PDF document text
    • http://jiboleramar.epizy.com/angamaly_diaries_trailer.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_off0000f24a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24A 5064 bytes
SHA-256: 7c9bb58100f5723c26302962fa5f5caa5f63a2a69e69549ba2211c4f19fba043
font_01_sfnt_off00010387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10387 10724 bytes
SHA-256: 9fe900a7f0f5fe6ad05f4e42fb63475720b8d1e6acefd1995160379013bc5a02
font_02_sfnt_off000127f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127F0 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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