Malicious PDF — malware analysis report

Static analysis result for SHA-256 05ae67d5c3a164a3…

MALICIOUS

PDF

77.1 KB Created: 2021-03-19 16:41:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 3f72c759875b6b93251203bf28c27417 SHA-1: 201781d4f5a5055db0fbec1ce05f3c332979e720 SHA-256: 05ae67d5c3a164a3659cc5fb5265da485ef9f76974b9ba46e429b44875001530
166 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it's a link farm and a lure for a password-protected archive. The embedded URL points to a suspicious domain, likely part of the distribution chain. While no scripts were directly extracted, the PDF structure and heuristics suggest it's designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://fokemale.ru/aws?utm_term=jabra+cruiser+2+reset+factory PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4476578/normal_5fceceddb9f26.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411916/normal_5fcb50043870d.pdfIn PDF document text
    • http://bimonetejatoleb.mygamesonline.org/27685837215.pdfIn PDF document text
    • https://domafotenok.weebly.com/uploads/1/3/5/9/135973376/3969598.pdfIn PDF document text
    • http://tunabamilusi.mypressonline.com/poesia_bucolica.pdfIn PDF document text
    • http://nagajavanof.22web.org/gloomhaven_classes.pdfIn PDF document text
    • https://luwuberukad.weebly.com/uploads/1/3/1/4/131409546/junabuwemixe.pdfIn PDF document text
    • https://pesuwoleze.weebly.com/uploads/1/3/5/2/135295903/rapexevipovo.pdfIn PDF document text
    • https://marejipafikelor.weebly.com/uploads/1/3/1/4/131437604/zufusaruwawanikid.pdfIn PDF document text
    • http://menesoger.iblogger.org/57976081835.pdfIn PDF document text
    • http://dakisemakegag.sportsontheweb.net/dan_brown_robert_langdon_books_movies.pdfIn PDF document text
    • https://mafojavakafox.weebly.com/uploads/1/3/0/8/130814343/furem_wepekuganar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/80faad04-295e-4ea7-b603-6af0e0ca1daa/molecular_biology_of_the_cell_5th_edition_garland_science.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28df35ca-363e-45ff-a5b7-95b795c5b145/21188880543.pdfIn PDF document text
    • http://selitesavuweg.epizy.com/zaxitowu.pdfIn PDF document text
    • http://bobupugarini.epizy.com/bigaranux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78ba46b3-0058-4338-aef5-87cf9505d7e9/92625112453.pdfIn PDF document text
    • http://pojenuza.epizy.com/zovoxef.pdfIn PDF document text
    • http://simusofitiralod.epizy.com/how_many_drops_of_essential_oil_in_a_5ml_bottle_doterra.pdfIn PDF document text
    • http://jefesati.rf.gd/ark_valguero_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3fd022f-1b46-42ee-806d-935cae713e9b/animation_for_dummies_free.pdfIn PDF document text
    • http://tasobigadegef.epizy.com/uniform_crime_report_purpose.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_off0000f15d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF15D 5208 bytes
SHA-256: 0fe32fc5053b95f6c8a9946c9fe07ae60394775564374ab87822baf563eea05d
font_01_sfnt_off0001032f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032F 10320 bytes
SHA-256: ba73aa93f12e76dccba86fc8c614e3550782b59680a954d1fdb6fcc76e39f912

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