Malicious PDF — malware analysis report

Static analysis result for SHA-256 579b877dd5edb418…

MALICIOUS

PDF

87.0 KB Created: 2021-04-10 21:56:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 362f8813bdb5025bfbea4b3c8befb585 SHA-1: 59ab58e97f275f9bcc4c5fc8ff2c93ae7bce4313 SHA-256: 579b877dd5edb418e4c03adf764c2fff998f96d893c102e8688b408ba8bb92c7
166 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'SE_PAYMENT_REDIRECT_LURE' indicates the document's content is designed to trick users into believing there are new or changed bank instructions, a common tactic in business email compromise attacks. The presence of external URIs and link farm patterns further supports a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://resalured.ru/strik?utm_term=what+is+the+benefit+of+a+deed+of+trust+to+secure+assumption PDF link annotation
    • http://xanejog.medianewsonline.com/13691950976.pdfIn PDF document text
    • http://basidugom.mygamesonline.org/clinical_anaesthesia_barash.pdfIn PDF document text
    • http://xitabijasava.getenjoyment.net/mcgraw_hill_cissp_all-in-one_exam_guide.pdfIn PDF document text
    • http://nepifumawal.22web.org/transport_mechanism_across_cell_membrane.pdfIn PDF document text
    • http://xafesuvorolivig.scienceontheweb.net/thrill_is_gone_tab.pdfIn PDF document text
    • http://medilawibume.scienceontheweb.net/bank_po_quant_book.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/91787274389.pdfIn PDF document text
    • http://jepekimeba.iblogger.org/adobe_premiere_pro_cs6_tutorial_text_animation.pdfIn PDF document text
    • http://peramabejakes.sportsontheweb.net/dubusob.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://todazanimidut.epizy.com/principles_of_accounting_book.pdfIn PDF document text
    • http://zaxatuparogojix.epizy.com/61347135011.pdfIn PDF document text
    • http://ketabigumowun.atwebpages.com/lawugowubidarififux.pdfIn PDF document text
    • http://jizonizop.rf.gd/vepuwibabosamagukovugo.pdfIn PDF document text
    • http://sadamenukovizep.epizy.com/protocolo_de_kioto_y_acuerdo_de_paris.pdfIn PDF document text
    • http://pedasamofujexeg.rf.gd/brocade_switch_configuration_guide.pdfIn PDF document text
    • http://dixadutawuk.epizy.com/kurizogeligani.pdfIn PDF document text
    • http://nugopedivewe.rf.gd/national_safety_council_logo.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/the_watsons_go_to_birmingham_2013_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/76636635628.pdfIn PDF document text
    • http://kezijewuzal.epizy.com/certificat_cession_vhicule_modifiable.pdfIn PDF document text
    • http://xakireponamo.rf.gd/zukabiwonalim.pdfIn PDF document text
    • http://bedigetulo.epizy.com/54437455907.pdfIn PDF document text
    • http://zijevaru.rf.gd/marriage_anniversary_wishes_in_marathi.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_off000114e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E5 5516 bytes
SHA-256: adf51f93da8e54c9d02dd8c5677f364b735952493ec7189a762285ff1540e383
font_01_sfnt_off00012781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12781 11496 bytes
SHA-256: beb50fcaceac64cc4f91887c1460d28ba3ca000220932b74e5ac0d72c79f59da

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