Malicious PDF — malware analysis report

Static analysis result for SHA-256 15705e413b9fd7a1…

MALICIOUS

PDF

74.5 KB Created: 2021-09-07 10:08:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 42aa727d78dae56cac7a9070f99c531d SHA-1: 2605b34700536af1f600f7bdde9b9ec2a61bb90e SHA-256: 15705e413b9fd7a1652da604866211d46426f6ab3e57001e6155666943bc3497
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan distribution attempt. The document functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised CMS upload directories. The primary purpose appears to be directing users to potentially malicious content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9885

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/a8dfe79c771aefd6f8b46533c9f13a72/wurinapabujulizifulenuke.pdf In PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/dusonuzetexa.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/a80ff7728d872cc04d5efae62047052b/zoreziwosiwu.pdfIn PDF document text
    • http://savvyais.com/userfiles/file/menuraribed.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/36898582842.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a33f9fe1667---nonexekusolafolaritigewi.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b90d2430ef8---42708526352.pdfIn PDF document text
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/77226932339.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/28aceih0kgd6m2jh1tffp95qo5/47714753788.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b84830ad126---409773291.pdfIn PDF document text
    • https://ski-valloire.com/ckfinder/userfiles/files/mevatamepizetofuxovorufez.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/f8c03b6182d6cd5c1bdd062447754c08/gavovalojedojiwinazezi.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/7b99ffd844d509289615bdc947f29e78/zufosagegu.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/tidapeb.pdfIn PDF document text
    • http://studiogeologicotrilobite.com/userfiles/files/55130258383.pdfIn PDF document text
    • https://equantumconsulting.com/files/files/96627499800.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1612341e192802---37003876351.pdfIn PDF document text
    • https://bcm.es/files/galeria/files/95110317979.pdfIn PDF document text
    • http://airelimpio.mx/img/editor/file/pavovulivixinizujut.pdfIn PDF document text
    • http://xn--80adpfaaeictf0c6c7i.xn--p1ai/public/file/17863099656.pdfIn PDF document text
    • http://iweldbot.com/ckfinder/pho/files/78238171274.pdfIn PDF document text
    • https://www.orthovision-lublin.pl/ckfinder/userfiles/files/57007583183.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/35d575eac78f8b128e11aca15449c8f6/89894594430.pdfIn PDF document text
    • http://kwiatmetal.pl/userfiles/file/97985468530.pdfIn PDF document text
    • http://www.fishandcosolicitors.com/uploads/files/pizukumemupodit.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae6c5452ef0---14559034225.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160868ca290479---tobidilidikixo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=electronic+lab+equipment+list+pdfPDF link annotation
    • 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://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_off0000bd3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD3B 17476 bytes
SHA-256: 1f51802d25bf6922a756c90dee6cc2f04c9a9bc53e823a749c2d39b5a0d0696a
font_01_sfnt_off0000eaab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAB 11152 bytes
SHA-256: 19482de57bf7a6c6e3577d965ad9043dfd5f6a41aa2f541f5073d9a37c9fbaa9
font_02_sfnt_off00010441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10441 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1