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) First seen: 2026-06-04
MD5: 40c412a0509786d08b32fb165840c301 SHA-1: 770465b0afb23da9288921f8038736c6c1b35e4a SHA-256: 1b16ccb52e1e5fd304ca8a4ea72100948f305097a5df6772fe6310f94c1abc7c
136 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it's a phishing lure, specifically using an image to redirect to a malicious URL. The ML classifier and ClamAV detection strongly support its malicious nature. The embedded URL, https://druttle.ru/strik?utm_term=emergency+medicine+physician+assistant+jobs+montana, is the primary indicator of the phishing attempt, likely serving as a gateway to a credential harvesting page or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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 PDF link annotation
    • http://folupebop.22web.org/cardamomo_en_guatemala.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377112/normal_5ff3548cd55c7.pdfIn PDF document text
    • http://xepuxupipe.mywebcommunity.org/difficult_equivalent_resistance_problems_with_solutions.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/que_es_un_titulo_de_credito_hipotecario_negociable_peru.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/semuwenelexaful.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379380/normal_6044743abcffa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383308/normal_601a3c8776c0e.pdfIn PDF document text
    • http://bapatavusirave.mygamesonline.org/qu_elementos_integran_una_composicin_musical.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420767/normal_5fcd79bdebdca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386080/normal_6013368e052d9.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/funegabanovatazutab.pdfIn PDF document text
    • http://zitupow.medianewsonline.com/grade_1_math_addition_and_subtraction_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/how_to_program_a_ge_universal_remote_control.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/virijokujizaxiziwuxajorip.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/tenudodenanadom.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/ccc_admit_card_kaise_kare.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ramigavatezeten.epizy.com/bahria_town_karachi_installment_challan_form.pdfIn PDF document text
    • http://zoberutobaf.epizy.com/kivilezal.pdfIn PDF document text
    • http://zenakezogutomu.onlinewebshop.net/benzoilmetronidazol_ems_bula.pdfIn PDF document text
    • http://vorokam.rf.gd/tolujekis.pdfIn PDF document text
    • http://begokev.epizy.com/mysql_connector_arduino_reference_manual.pdfIn PDF document text
    • http://tilanetojik.rf.gd/62806772386.pdfIn PDF document text
    • http://xanabakawori.epizy.com/bateria_de_riesgos_psicosociales.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_off0000f025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF025 5732 bytes
SHA-256: 9cd7d2a562dd771d25c0b7467faf062b101cd15c16196194bf44ffcd1c07d246
font_01_sfnt_off00010385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10385 10568 bytes
SHA-256: b0733334fd4e28b9ea664559975457d7055cc1e98ea74ceaec14edc6ab9d8a5f