Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cf46c664aab15b9…

MALICIOUS

PDF

79.7 KB Created: 2021-03-31 10:55:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: a819f7eac6608d4c4ff10f0ab144a494 SHA-1: 2d5592973f26d4935fba4b969a005cd3872764a7 SHA-256: 4cf46c664aab15b9dbc068dff223c4e452a4d69e2e9d3b9a1e1eb7fc8d0b9176
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, with one specifically pointing to a URL that mimics a search result for 'how to clean fume hood filter'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the presence of numerous URLs suggests a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/strik?utm_term=how+to+clean+fume+hood+filter PDF link annotation
    • http://gepopusoka.mypressonline.com/vowiv.pdfIn PDF document text
    • http://jevufoduxixan.22web.org/59154841327.pdfIn PDF document text
    • https://cdn.sqhk.co/rexadiwixox/iIXiftL/autodesk_mac_free.pdfIn PDF document text
    • http://solusaxisabo.scienceontheweb.net/plantronics_backbeat_pro_2_review_reddit.pdfIn PDF document text
    • http://kafalukuwemi.mygamesonline.org/47286819590.pdfIn PDF document text
    • https://cdn.sqhk.co/limizolaxa/e2gjiay/tree_template_with_roots.pdfIn PDF document text
    • https://cdn.sqhk.co/kokowoxiwi/iibhbdn/matching_letter_sounds_with_pictures_worksheets.pdfIn PDF document text
    • http://kobopez.mygamesonline.org/ancient_words_sheet_music_free.pdfIn PDF document text
    • https://cdn.sqhk.co/furafurume/jbthfid/9983350409.pdfIn PDF document text
    • https://cdn.sqhk.co/gikasiful/giKrgik/net_ionic_equation_worksheet_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/dagozuwemep/jRXIgdB/shadow_project_naslan_bomber.pdfIn PDF document text
    • http://lologunaw.mygamesonline.org/lakagedinijeledone.pdfIn PDF document text
    • https://cdn.sqhk.co/tazuxalana/epgh0je/45160479564.pdfIn PDF document text
    • http://vofigasu.medianewsonline.com/mastectomy_types.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fezuveguxala.epizy.com/descargar_gratis_libro_los_anunnaki_creadores_de_la_humanidad.pdfIn PDF document text
    • http://sikofus.epizy.com/chamberlain_whisper_drive_plus_manual_hd900cd.pdfIn PDF document text
    • http://gudugapapilile.atwebpages.com/32411538569.pdfIn PDF document text
    • http://xagubono.epizy.com/social_psychology_10th_edition_saul_kassin.pdfIn PDF document text
    • http://tanadumowijilum.rf.gd/bhavani_ashtakam_tamil.pdfIn PDF document text
    • http://kipazafar.atwebpages.com/what_does_van_mean_in_english.pdfIn PDF document text
    • http://nifubaj.rf.gd/47712707865.pdfIn PDF document text
    • http://poxizigifami.epizy.com/digestive_system_practice_test_with_answers.pdfIn PDF document text
    • http://wusozugidiwe.rf.gd/64085530981.pdfIn PDF document text
    • http://vekabibazegak.rf.gd/how_to_draw_a_dog_bone_for_beginners.pdfIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/rubopojobekojosuxupu.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_off0000fb29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB29 5136 bytes
SHA-256: 88a30b2058c176014a8914cacc4d848975831283c78514be886d51eda4795cec
font_01_sfnt_off00010c87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C87 10840 bytes
SHA-256: 3109d7fc99d1ed2991e2f8d77cf4804e45cbf1299411987f85f38dd7b25dcace

Open this report in the interactive analyzer, or submit your own file for analysis.