Malicious PDF — malware analysis report

Static analysis result for SHA-256 45de1fdf35565285…

MALICIOUS

PDF

77.7 KB Created: 2021-03-22 07:39:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 0880a3c477c49c817be53b408049a49a SHA-1: cba047ea9c5ee18ef566cdeb6c0d94d2477e4982 SHA-256: 45de1fdf355652852d0cbf2434544f9eac97cf99eb9fafb3a5350bfdd5109deb
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The PDF contains numerous embedded URLs, with at least one identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • 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 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://lozipotod.ru/wix?keyword=campo+de+estudio+de+la+biologia+y+sus+divisiones PDF link annotation
    • https://cdn.sqhk.co/jumapevuz/fgjgghe/lasamawawotuse.pdfIn PDF document text
    • http://1gusevshop.space/snow_white_with_the_red_hair_shirayuki_last_name5qqbm.pdfIn PDF document text
    • http://myluckywin.site/720029420349wjrg.pdfIn PDF document text
    • http://tatanip.medianewsonline.com/alpinismo_definicion.pdfIn PDF document text
    • http://my-favshopd.online/skyrim_special_edition_ini_fileuigqc.pdfIn PDF document text
    • http://mon-cmso.best/jeu_de_cartes_stravinsky_imslprsd4h.pdfIn PDF document text
    • http://bukenisefino.mygamesonline.org/52869711896.pdfIn PDF document text
    • https://cdn.sqhk.co/tosilura/idjdhh2/bird_paradise_flower.pdfIn PDF document text
    • http://profit-makers.club/84790603833wc6ah.pdfIn PDF document text
    • https://cdn.sqhk.co/xafukapewe/BRhiiij/rimworld_colony_setup.pdfIn PDF document text
    • http://rebezun.mygamesonline.org/rheem_tankless_gas_water_heater_reset_button.pdfIn PDF document text
    • https://cdn.sqhk.co/nodujugebi/VP1iche/89572279730.pdfIn PDF document text
    • https://cdn.sqhk.co/subilikiwi/jj0Lhd2/amaze_file_manager_full_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6cda4dd4-8aac-43e7-8003-7c0eea9f7907.filesusr.com/ugd/34e26e_c9600dc8ca47459a9facf024d438c7ce.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zuponefi/mental_concepts_or_templates_that_intuitively_guide_our_perceptions_and_interpretations_are_called.pdfIn PDF document text
    • https://156bb51f-0b62-477f-88ca-8620af00812b.filesusr.com/ugd/e3ff21_6777f2113dd144e3844bab8b43f254ab.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jiwisi/jokisidatewejigenas.pdfIn PDF document text
    • https://34e223d5-b18a-4f89-96b3-7c58aa965d90.filesusr.com/ugd/440e29_4f123a92a2f0425194dadf94d8c833b6.pdf?index=trueIn PDF document text
    • https://6bc61794-ec17-45f1-96eb-8bed4cd57308.filesusr.com/ugd/217b8a_b615594cfb3742e6b297cfc99817b7a4.pdf?index=trueIn PDF document text
    • http://vekamodadon.onlinewebshop.net/adjektivdeklination_deutsch.pdfIn PDF document text
    • https://44f39d5c-a655-4437-91b6-62b11e148e71.filesusr.com/ugd/eb4c03_0e2549c8582b4f87866bb74fdebb3340.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/telugu_audio_songs_new_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/dotuvoxifoteg.pdfIn PDF document text
    • https://41be308f-8a64-4dec-8b30-4937605be974.filesusr.com/ugd/f042fe_0388ee17da2f4f62a1a2331175c9b44a.pdf?index=trueIn PDF document text
    • https://b6de9e3f-c562-4e05-b5ee-70895c8060ae.filesusr.com/ugd/3801ff_c353f20591da4f198285055fea835355.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dojonuta/18804290191.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_off0000f01e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01E 5388 bytes
SHA-256: 5d0c3fb66dd1c81723f3770ee5f4c4efbc4a240f7ea521cb90a0f9e32447adfc
font_01_sfnt_off00010268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10268 11976 bytes
SHA-256: ea82ca547c01fd4306e6a64af826daddf4749051d4c516960f6704d7cc8c72ca