Malicious PDF — malware analysis report

Static analysis result for SHA-256 08daf45b0b6b8f48…

MALICIOUS

PDF

76.2 KB Created: 2021-02-25 07:58:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 2b09aff20ede10d075154e48cc49a25d SHA-1: 36250059d64a49e94cb862b36c82d37ac0231b6f SHA-256: 08daf45b0b6b8f480e3d9442c158b9fc299ffa6cc282677c93beae9d4cc3b7cd
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution scheme. The heuristic 'SE_LOLBIN_RUN_COMMAND' indicates potential execution of commands, possibly involving PowerShell, and the ML classifier strongly flags this PDF as malicious. The ClamAV detection confirms its malicious nature, identifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://crophysi.ru/123?utm_term=iso+31000+risk+management+stages PDF link annotation
    • http://copyright-services-us.com/goodlife_fitness_membershipxxmt9.pdfIn PDF document text
    • http://taforojujutusig.mygamesonline.org/nofikewufasivave.pdfIn PDF document text
    • https://kavisovilige.weebly.com/uploads/1/3/5/3/135308643/8fa333b.pdfIn PDF document text
    • http://rafupofamurawaf.mygamesonline.org/sony_rx10_v_news.pdfIn PDF document text
    • https://federadedeladol.weebly.com/uploads/1/3/4/6/134626130/6a72d1.pdfIn PDF document text
    • http://palikexifumalam.mywebcommunity.org/lg_refrigerator_lfx28968st_freezer_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/jisanipu/ciiVieE/bowling_paradise_center.pdfIn PDF document text
    • http://vaxisezawoged.scienceontheweb.net/how_to_soft_reset_samsung_tab_3.pdfIn PDF document text
    • http://stavki-na-sport.site/tafsir_surah_al_waqiah29cdy.pdfIn PDF document text
    • http://yozi.store/batalanobuzaript8lf9.pdfIn PDF document text
    • https://cdn.sqhk.co/nosisatoved/4jhgcH3/star_wars_sound_effects_free_mp3_download.pdfIn PDF document text
    • http://stylecurtains.com/powershell_install_nuget_provider_manually64n7b.pdfIn PDF document text
    • http://riwotivadejud.sportsontheweb.net/15197005085.pdfIn PDF document text
    • https://werotibumef.weebly.com/uploads/1/3/4/9/134900185/6cda2e11a512.pdfIn PDF document text
    • https://cdn.sqhk.co/dolafita/jfugeid/namokovoxugavuzilugemene.pdfIn PDF document text
    • https://wisolowiguwo.weebly.com/uploads/1/3/4/6/134630140/bevina.pdfIn PDF document text
    • https://cdn.sqhk.co/dosapupa/5W2zhdn/jogusegasob.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rosajeku.myartsonline.com/vezaxidazana.pdfIn PDF document text
    • http://dowuvoduwitovos.atwebpages.com/dekes.pdfIn PDF document text
    • http://vorisenunajix.myartsonline.com/the_city_and_the_city_book_review.pdfIn PDF document text
    • http://wenares.myartsonline.com/counterbalance_forklift_training_near_me.pdfIn macro / runtime command snippet
    • http://zotubune.myartsonline.com/baxugowejarizexi.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_off0000ed0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0F 5332 bytes
SHA-256: 5a5f9faab8bedc09c44be910e3e93537e597a0725eb6ad419ff8300f084d24a9
font_01_sfnt_off0000ff24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF24 10392 bytes
SHA-256: b4e5ef58b2affc41de555112c5cc6ca2c3be60c0680d7a564dc6ba70c0302865

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