Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe124b542de558e9…

MALICIOUS

PDF

84.0 KB Created: 2021-03-27 23:01:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 7e6662f1905616b59b1d451fa7f6b7db SHA-1: 4540d2f6d767b9b8c098f0cf717b8e135f4435c7 SHA-256: fe124b542de558e9339a0a9081a16147339cf294733a5df2394c3a46f5995579
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, with at least one pointing to a suspicious domain ('resalured.ru') and another to a link farm on disposable hosting ('best-store.club'). These URLs likely serve as lures to phishing sites or malware downloaders. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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/award?keyword=constant+values+in+physics+pdf PDF link annotation
    • http://best-store.club/pretty_ballerina_ballet_dreams_gamemhehi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369502/normal_5fdb705cd307b.pdfIn PDF document text
    • http://xemokajoled.medianewsonline.com/dinikujuvakaxivarogugaja.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387562/normal_5ffb26207eaa7.pdfIn PDF document text
    • http://leporabev.mywebcommunity.org/lrt_adhi_karya.pdfIn PDF document text
    • http://pochta-24.cc/43933904874l4py.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/xapota/79237235440.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de39fa7f-0a2d-4ad6-93de-6be1ef24a1fe/how_to_attach_headboard_to_leggett_and_platt_50_series_adjustable_base.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/coulomb_damping.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/179abdf5-9a45-44b9-b6ab-ebcc584c411a/xebanevenojugalefifog.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/samsung_j5_bypass_google_account_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/tabla_de_distribucion_normal_estandar_acumulada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bb0e6f9-ecda-428a-84d4-31c173e2d096/81371301178.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da25af3e-67be-4e76-9bba-1b73ead8263e/how_long_do_lg_refrigerators_last.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0458a3c4-57f3-4742-91b3-7987aebe72b4/1970_ford_mustang_mach_1_horsepower.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0aa871c7-22b6-4db3-bcd9-fc5c02198f17/12015776702.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/cpt_coding_categories_worksheet.pdfIn PDF document text
    • http://wegamaluperetuj.atwebpages.com/nifisi.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF030 5212 bytes
SHA-256: ec2cf7a7452eba34f1aa64652e890b9fa42134aff4c84e65b8e9b5075958ff78
font_01_sfnt_off000101fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101FA 12600 bytes
SHA-256: ae2c8d15ca5b308e1f56d253b93724251f3a51f8a277f8939e3a4d38cb386b89
font_02_sfnt_off00012d66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D66 16176 bytes
SHA-256: 70bc80a8707265b6a888662b99aed3b3b1b8e09cfae0a733e504de2f1228a0da

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