Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b15e6a4adbd9e57…

MALICIOUS

PDF

92.0 KB Created: 2021-04-05 13:53:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 924ae75f08a42ca2b0884e3acb978be1 SHA-1: 46070ae4954b72aa877f890f2df3abbbe6ab3edd SHA-256: 4b15e6a4adbd9e57830cc7a60705c262cefe9f712e0177ae93a4b57a75f3944f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://baarspo.ru/123?utm_term=lagu+can+we+kiss+forever+joker PDF link annotation
    • http://rodsfish.club/carvedilol_msdsuxk0t.pdfIn PDF document text
    • http://rerixen.scienceontheweb.net/nerewi.pdfIn PDF document text
    • http://xevijuwidenuxet.mypressonline.com/apc_smart_ups_1000va_specification.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • http://differencecheats.net/nabeganimoxazeo2r5.pdfIn PDF document text
    • http://eduha.online/customer_complaints_email_template7zhyt.pdfIn PDF document text
    • http://podcard2020.site/402569374264tlof.pdfIn PDF document text
    • http://onatural.space/defevofitituwvz9du.pdfIn PDF document text
    • http://tozemudezajif.mygamesonline.org/86772037386.pdfIn PDF document text
    • http://zoo-taxi.site/thinkpad_t420_bios_update_linuxv8k7h.pdfIn PDF document text
    • http://ruwazumusef.scienceontheweb.net/13276052746.pdfIn PDF document text
    • http://worozoxiw.sportsontheweb.net/how_to_find_simple_interest_and_maturity_value.pdfIn PDF document text
    • http://zajilakofudo.scienceontheweb.net/gumefujopibinenojen.pdfIn PDF document text
    • http://bitalotava.scienceontheweb.net/almonard_industrial_fans_catalogue.pdfIn PDF document text
    • http://help-mediasupport.com/2192620461390uie.pdfIn PDF document text
    • http://sokolov.fun/absceso_cerebral_2018w5acb.pdfIn PDF document text
    • http://worelimupuvefam.mywebcommunity.org/patologias_aparato_reproductor_femenino.pdfIn PDF document text
    • http://datinge.site/noperit66ld.pdfIn PDF document text
    • http://xadazobisisim.scienceontheweb.net/99188361430.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1306d20-6bdf-409d-9b5d-68c543911420/87795008269.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd794d8e-0328-4b25-9053-866cbe3adb63/vadememewoxowef.pdfIn PDF document text
    • http://suvalomimo.atwebpages.com/1058152995.pdfIn PDF document text
    • http://zaduzos.myartsonline.com/blender_tutorial_animation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b400833e-7d8b-436e-9f80-a5191fbdff00/how_to_assemble_baby_einstein_activity_jumper.pdfIn PDF document text
    • http://kavibajegis.onlinewebshop.net/universal_laser_systems_parts.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D8 3176 bytes
SHA-256: 61b8b32f4d84cdac159ef5de5856a6f64ba956dde43d9f57a4118cb1e73cd3e8
font_01_sfnt_off0000ed42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED42 5252 bytes
SHA-256: a61c9091a247ffc75e848d4c4936964d54e336e1eef96a174be93b279aef9e16
font_02_sfnt_off0000ff53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF53 4124 bytes
SHA-256: 36cb46912fb7d22878aebb9a854283ca1f6beae7b06de9cf35ae505c921c886e
font_03_sfnt_off00010f79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F79 10828 bytes
SHA-256: ec30df254eb076e0b2a71e44d126eee073156cee5117f06c46ab31d310a5566f
font_04_sfnt_off000134f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134F9 17824 bytes
SHA-256: e75fc0295dd2113667e032d79a163fccd4aefd044e0ee4d47636ca3962de6a0b
font_05_sfnt_off0001504f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1504F 6104 bytes
SHA-256: 932ed85a93102613222519320e5b03ff0820c7c853bb4feb7922ef9cc8ec1c18

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