Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5e8fc8f7c27c415…

MALICIOUS

PDF

82.5 KB Created: 2021-03-24 21:48:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: c59a3c29f98f05b839cb71e5023d672a SHA-1: 7ec9c942ca1ac2be9946b930f1cf072288ebe441 SHA-256: f5e8fc8f7c27c415a1bea45bf25ad3b73f5605cb75fcf22ac7af95482ba7ef84
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF link farm'. The ClamAV detection and ML classifier strongly indicate maliciousness, classifying it as a phishing trojan. The embedded URLs suggest the document is designed to redirect users to potentially malicious websites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/123?utm_term=apa+style+referencing+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4425256/normal_5fcb3329201b9.pdfIn PDF document text
    • http://lidujer.22web.org/miss_peregrine_home_for_peculiar_books_in_order.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368952/normal_60298bd8428fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375340/normal_6033051ec4e49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498994/normal_603969f120adf.pdfIn PDF document text
    • http://mivimivisodawo.iblogger.org/68119937062.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487927/normal_5fd3183e87a00.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xobofob.rf.gd/kugawipiboveru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c1fa11d-c227-4cfe-92c2-cc4867781123/nespresso_coffee_vertuoline_capsules_holder_carousel.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/jamenufolibukesepiwasa.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/active_directory_ou_template.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/vabizufujegotasogalivurug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db220b28-f290-4732-88ea-3c3b85e1155d/1404471015.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/vozuzetisejajiju.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/zebodubazarufikedoloboxid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e650a5b9-11ab-416b-9188-ddb3b4f40751/39757637823.pdfIn PDF document text
    • https://3d7304b5-8527-495f-b913-615d6f357a43.filesusr.com/ugd/ef7486_a08f074b9b9845ac8d9a50fef52d8439.pdf?index=trueIn PDF document text
    • http://xafenala.epizy.com/40853818288.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/twisted_treeline_ranked_guide.pdfIn PDF document text
    • https://1e8c0764-4a0f-46ab-84a2-5f63a8a44928.filesusr.com/ugd/6a0acf_5a5ae7078e254265aaa637ec689fd9dd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/63455374045.pdfIn PDF document text
    • http://gofosuxubajo.epizy.com/actian_psql_v13_client.pdfIn PDF document text
    • https://883cd1dc-02d0-4059-8fa2-99201f92b631.filesusr.com/ugd/6166c9_28b58a5c975f4a1db88fbfd98258cafb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/46359830107.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_off00010612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10612 5416 bytes
SHA-256: d135fde34a9727f1a8bbb3852828d4289c692cafeaa60628952f14f68a5d3b08
font_01_sfnt_off00011897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11897 10388 bytes
SHA-256: 17b6df27677e3caeb1973b52ba7b0b921135c177d2970fbbbb9cf75f0d85f28a

Open this report in the interactive analyzer, or submit your own file for analysis.