Malicious PDF — malware analysis report

Static analysis result for SHA-256 1965bed6f665dfe5…

MALICIOUS

PDF

78.1 KB Created: 2021-04-07 06:35:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: cd923f588b8c91b51090185b83d95d9c SHA-1: 855a7712b88cddc36d0882991c0af7b388d209ff SHA-256: 1965bed6f665dfe544189bee5bda9746339780a62ec1b3d063e5ca0b86d6af23
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 0.9964

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://dafemum.ru/award?keyword=breast+cancer+facts+2020+pdf PDF link annotation
    • https://cdn.sqhk.co/medukukekuke/4uiehcG/55503301672.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490244/normal_606a4452068f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377663/normal_606a21ae0c462.pdfIn PDF document text
    • https://cdn.sqhk.co/dusaradezat/jcwnZie/singing_machine_app_review.pdfIn PDF document text
    • http://wativeb.mypressonline.com/69983423615.pdfIn PDF document text
    • https://cdn.sqhk.co/koxixoneto/cqNZxgj/lenovo_tablet_e10_user_guide.pdfIn PDF document text
    • http://zumanidoxup.medianewsonline.com/celestine_prophecy_experiential_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445754/normal_5fd7b23bed118.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505699/normal_600eaf95a1d18.pdfIn PDF document text
    • http://lukiduxipapep.mywebcommunity.org/online_nonimmigrant_visa_application_ds_160.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416322/normal_5fd06a3cd72d9.pdfIn PDF document text
    • https://cdn.sqhk.co/budatumibowu/ibkhjZz/ice_cream_maker_reviews_america_s_test_kitchen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391327/normal_603264bc8ddf4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421461/normal_603f1f9a30eaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489042/normal_6064f32c013c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479441/normal_5fddd1c572d31.pdfIn PDF document text
    • https://cdn.sqhk.co/likafupat/jcGhghg/ben_ten_alien_force_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/kutajanode/eeZyzig/1779629690.pdfIn PDF document text
    • https://cdn.sqhk.co/lusimalifa/LRifo4u/e_tickets_live_nation.pdfIn PDF document text
    • https://cdn.sqhk.co/pumopijaku/zNXIgf6/kizijunezepozeta.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/letra_de_la_cancion_stressed_out_en_ingles_itsy_bitsy_spider.pdfIn PDF document text
    • http://rosajeku.myartsonline.com/lijidurina.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/badge_mockups_template.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/62531759529.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/whatsapp_for_nokia_216_phone.pdfIn PDF document text
    • http://retiziwo.myartsonline.com/91007324299.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_off0000f273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF273 5440 bytes
SHA-256: 8414e72a27842f6e685e41730aeeddb4261dd018342770f1fc835b2edde3c58b
font_01_sfnt_off00010504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10504 11336 bytes
SHA-256: 5adda7e7d7a90811afff376ec4ff14f31d97a70b2bdefbc15a72add5879c39c6

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