Malicious PDF — malware analysis report

Static analysis result for SHA-256 893245d45b12a5b7…

MALICIOUS

PDF

77.0 KB Created: 2021-03-08 03:53:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 50d117a87e407e7df635706a7120da26 SHA-1: 97f3030b2448e00dd4f3147b4e2f6fa3f8e55c25 SHA-256: 893245d45b12a5b7cfd8ae6cbd72f3ac69d914b295f271f88f85ce511500df14
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/strik?utm_term=how+to+sync+my+summer+infant+video+monitor PDF link annotation
    • https://cdn.sqhk.co/gitogozune/gGVihcJ/juvibigimorojotorivaxulal.pdfIn PDF document text
    • https://cdn.sqhk.co/dorusafe/iaEZja9/bio_inc_redemption_trainer.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/jj9jaoi/4_pics_1_word_game_answers_all_levels.pdfIn PDF document text
    • https://zokupirijega.weebly.com/uploads/1/3/4/0/134000213/kokiwizazotoji_vusakar.pdfIn PDF document text
    • http://texoraw.sportsontheweb.net/97023172145.pdfIn PDF document text
    • https://cdn.sqhk.co/dagozuwemep/hcorB2t/galaxy_attack_alien_shooter_geschenkcode_2019.pdfIn PDF document text
    • http://lodixewovufosa.iblogger.org/disruptive_stabilizing_and_directional_selection_worksheet.pdfIn PDF document text
    • http://expressvpn.store/cyberpower_cp1500pfclcd_pfc_sinewave_ups_reviewzh462.pdfIn PDF document text
    • https://pesudimudoselu.weebly.com/uploads/1/3/2/6/132681392/edb50.pdfIn PDF document text
    • https://timonuwek.weebly.com/uploads/1/3/4/3/134383578/gomikoludixowu.pdfIn PDF document text
    • https://tutuludoj.weebly.com/uploads/1/3/0/8/130874598/vekuboruzafuf_sabedumazibalib.pdfIn PDF document text
    • http://excellent-spb.ru/16864080035tcxqm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/5e788fd5-9682-456b-b412-c9c9e4c1c4c8/zirenosufojawo.pdfIn PDF document text
    • http://xixovunutev.epizy.com/hp_laserjet_pro_400_color_m451nw_manual.pdfIn PDF document text
    • http://dikekonigexixa.epizy.com/lirafufopasoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e04f082-c890-43cf-9094-f318b4b14ae2/tica_para_amador_captulo_6_preguntas_y_respuestas.pdfIn PDF document text
    • http://sekuwomexapa.myartsonline.com/howls_moving_castle_book_barnes_and_noble.pdfIn PDF document text
    • http://zubiluwetij.myartsonline.com/60765264128.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e13b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE13B 5232 bytes
SHA-256: a7a2be583fa9a68f8b68bb2a69f4b89f0d426e3579b78a14601c81dd2638160f
font_01_sfnt_off0000f2fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FC 10856 bytes
SHA-256: 7b255b50d0594e137e64b47ac62654a57a5e0127ae3d3f68658a9bcb9cabf92f
font_02_sfnt_off00011827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11827 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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