Malicious PDF — malware analysis report

Static analysis result for SHA-256 7efad833eb5d2e57…

MALICIOUS

PDF

71.8 KB Created: 2021-03-31 07:57:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6343974b6a3e463a63cb684bf2530cbd SHA-1: 95f7f418fc2ce6a4b4382dd1d3241d384bc9b789 SHA-256: 7efad833eb5d2e575eb8e95c684b3dc7a4386a46940e99dd92d2a5d19fdbf57b
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 0.9996

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://botokaw.ru/award?keyword=new+headway+beginner+4th+edition+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4460972/normal_5feb7a19ea003.pdfIn PDF document text
    • http://wazepewazivulil.mywebcommunity.org/cengage_chemistry_for_neet_free_download.pdfIn PDF document text
    • http://pefiworawodud.mypressonline.com/saheeh_international_quran_arabic_text_and_english_translation.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366364/normal_5ff763a76a807.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377706/normal_5ffff9009d3d4.pdfIn PDF document text
    • http://dokakepitizix.medianewsonline.com/hsc_biology_question_paper_2020.pdfIn PDF document text
    • http://ralugugifoxatir.scienceontheweb.net/samsung_french_door_bottom_freezer_ice_maker_not_working.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421641/normal_5fd0ec1f03cca.pdfIn PDF document text
    • http://wolifote.getenjoyment.net/75279810009.pdfIn PDF document text
    • http://zixivudu.getenjoyment.net/kufetebuzobojamonax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1628ddcf-e301-416d-9649-d9339b85441b.filesusr.com/ugd/0b1079_c506715b85e5453a97e56936ba080ff9.pdf?index=trueIn PDF document text
    • http://dirulibas.onlinewebshop.net/rodokajitukefogisufet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59b27d96-d3de-4277-9ebc-bb7beedfe4e3/how_to_know_if_you_have_acne_or_just_spots.pdfIn PDF document text
    • https://f421159b-d329-41e8-bc42-072bc93e4c50.filesusr.com/ugd/65d6f7_146fe5e02a1848c69f53b9f755f39aad.pdf?index=trueIn PDF document text
    • http://sopexalibip.onlinewebshop.net/19090788289.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/645f4959-deaf-472a-9284-23ee3506fe6b/85347651025.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af0c94a8-699b-4693-8d7f-63fb033f7cb8/2016_harley_davidson_street_glide_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0ddd650-e8b0-45e1-a69c-f3e949600f95/free_willy_cast_and_crew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32d13b30-40ea-43ac-81b2-a89264ab1591/cuantos_centimetros_hay_en_un_metro_cuadrado.pdfIn PDF document text
    • https://73e25548-3913-4bbb-aa69-a1b25f69568d.filesusr.com/ugd/cece23_f086cddd80f3492a9080e6b8221f11f0.pdf?index=trueIn PDF document text
    • http://bumurulepowele.myartsonline.com/schneider_electric_rccb_catalogue.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_off0000d64e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD64E 5484 bytes
SHA-256: c689303c86eef754c43fd37f90d1fab5cc1192c242c3457754fa1836b06fada1
font_01_sfnt_off0000e91b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91B 12972 bytes
SHA-256: 9ce2277508bf24132fff1f4abad0f7ed2e68903f453ee3b316aaa23a8a58842f

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