Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b16ccb52e1e5fd3…

MALICIOUS

PDF

77.3 KB Created: 2021-04-06 06:03:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40c412a0509786d08b32fb165840c301 SHA-1: 770465b0afb23da9288921f8038736c6c1b35e4a SHA-256: 1b16ccb52e1e5fd304ca8a4ea72100948f305097a5df6772fe6310f94c1abc7c
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a phishing site, disguised as job search results. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to lead the user to a malicious external resource, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/strik?utm_term=emergency+medicine+physician+assistant+jobs+montana
    • http://folupebop.22web.org/cardamomo_en_guatemala.pdf
    • https://static.s123-cdn-static.com/uploads/4377112/normal_5ff3548cd55c7.pdf
    • http://xepuxupipe.mywebcommunity.org/difficult_equivalent_resistance_problems_with_solutions.pdf
    • http://lojapidabud.mypressonline.com/que_es_un_titulo_de_credito_hipotecario_negociable_peru.pdf
    • https://cdn-cms.f-static.net/uploads/4379380/normal_6044743abcffa.pdf
    • https://cdn-cms.f-static.net/uploads/4383308/normal_601a3c8776c0e.pdf
    • http://bapatavusirave.mygamesonline.org/qu_elementos_integran_una_composicin_musical.pdf
    • https://static.s123-cdn-static.com/uploads/4420767/normal_5fcd79bdebdca.pdf
    • https://cdn-cms.f-static.net/uploads/4386080/normal_6013368e052d9.pdf
    • http://zitupow.medianewsonline.com/grade_1_math_addition_and_subtraction_worksheets.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lewuli/semuwenelexaful.pdf
    • http://ramigavatezeten.epizy.com/bahria_town_karachi_installment_challan_form.pdf
    • http://zoberutobaf.epizy.com/kivilezal.pdf
    • http://zenakezogutomu.onlinewebshop.net/benzoilmetronidazol_ems_bula.pdf
    • http://vorokam.rf.gd/tolujekis.pdf
    • https://s3.amazonaws.com/baxadelefofibuz/funegabanovatazutab.pdf
    • https://s3.amazonaws.com/bokexizometun/how_to_program_a_ge_universal_remote_control.pdf
    • https://s3.amazonaws.com/gidibesuxi/virijokujizaxiziwuxajorip.pdf
    • https://s3.amazonaws.com/fedojigudaj/tenudodenanadom.pdf
    • https://s3.amazonaws.com/fidobakipivogit/ccc_admit_card_kaise_kare.pdf
    • http://begokev.epizy.com/mysql_connector_arduino_reference_manual.pdf
    • http://tilanetojik.rf.gd/62806772386.pdf
    • http://xanabakawori.epizy.com/bateria_de_riesgos_psicosociales.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f025.bin
9cd7d2a562dd771d25c0b7467faf062b101cd15c16196194bf44ffcd1c07d246		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF025 5732 bytes
font_01_sfnt_off00010385.bin
b0733334fd4e28b9ea664559975457d7055cc1e98ea74ceaec14edc6ab9d8a5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10385 10568 bytes

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