Malicious PDF — malware analysis report

Static analysis result for SHA-256 45883db378e48fc4…

MALICIOUS

PDF

107.1 KB Created: 2021-03-20 10:12:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 9384321e44fa8f42aa55a681f8a5e76e SHA-1: bce4210d8d04ac5c32fc041ba124c8a69e7f33f5 SHA-256: 45883db378e48fc4551059edc7ec5dbf2740acfb809902b14ff3041ad19cbcd4
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and a heuristic identified it as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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://bologen.ru/wix?keyword=eid+dates+2015 PDF link annotation
    • http://gomakugagazeg.iblogger.org/31558616876.pdfIn PDF document text
    • http://nubiviw.22web.org/anemia_segun_minsa.pdfIn PDF document text
    • http://copyright-securityx.com/spoken_english_video_lessons_for_beginners3504n.pdfIn PDF document text
    • https://cdn.sqhk.co/tememukafosu/CgjhnTn/zowakogi.pdfIn PDF document text
    • https://cdn.sqhk.co/nilesatu/hgidOzK/idle_lemonade_company_lemon_empire_clicker_download.pdfIn PDF document text
    • http://bluebadgeapproval.com/pexerumotodakavoruwergw5r.pdfIn PDF document text
    • http://imedo.ru/printable_worksheets_possessive_nouns9pjqg.pdfIn PDF document text
    • http://hidver.com/resumen_del_libro_para_leer_al_pato_donaldfx95r.pdfIn PDF document text
    • https://cdn.sqhk.co/xiruregexibe/hgFhfhi/deadly_car_accident_today_near_me.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/what_is_p_and_n_type_materials.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dd47a5b-9bdb-4972-8da8-6354ebd509d6/2000_ezgo_golf_cart_parts_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09f55dfc-bae7-4cb2-8042-9b50169596c5/gaxokovo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37f0b2c0-43b1-42e1-9dcb-0b860a5ee5d2/raxatorit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6a162d5-694d-4afc-be9e-4f2e9c849599/the_book_of_basketball_bill_simmons.pdfIn PDF document text
    • http://sarirasa.epizy.com/20664283369.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/create_login_page_for_wordpress_website.pdfIn PDF document text
    • http://kavotipuwevir.epizy.com/rinuse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cff3603-5dbb-46f8-bf27-9f963a540c7f/principles_of_total_quality_management.pdfIn PDF document text
    • http://ravuxisopol.rf.gd/49416827439.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/apple_mac_pro_laptop_user_guide.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text

Extracted artifacts 9

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_009_off00016dc0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16DC0 20128 bytes
SHA-256: a15506a469659bb7e34d09774835283a6a8b629a184955bcde6214e0ab8fbf6c
font_00_sfnt_off0000e70c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE70C 4376 bytes
SHA-256: 302910eba961c326b19c805f85d120664126f0ce57dfa801b7c1563d0029469f
font_01_sfnt_off0000f65e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65E 5096 bytes
SHA-256: 6a4243627f80caf6673cdabd0e23e1b01f5fa70bc7f0e9c22bf95cb79e6c9511
font_02_sfnt_off000107c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C7 6060 bytes
SHA-256: df2f2da1a4ac003d720667bc97b9adf00d852d71400ba52e4727218d80426b34
font_03_sfnt_off00011ba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA0 3792 bytes
SHA-256: ec6ade3daa1cc5b8f0bb645e9f6854ca955eae8935cbf660c6fa880d556cb999
font_04_sfnt_off000129fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129FB 2380 bytes
SHA-256: 2c8bf6e637a6e26c430fd24035a0e5bd42aa87172b0e53bdd53946cafbe38322
font_05_sfnt_off000134e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134E6 5452 bytes
SHA-256: a4c558d3039e9d433cece8f2bc663589f3f462af71e5ba4f1e40b4f8ff5c42c6
font_06_sfnt_off000147fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147FA 11184 bytes
SHA-256: 7e6c32b2e4a5e724dc7fe8462bc0d09e7d26593b31cbb6013acf31867a2165cb
font_08_sfnt_off00018f5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F5E 3416 bytes
SHA-256: b3f62fb430200241463f51eb822b0bc1d3392badbf4ece7e2b09e4049608997c

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