Malicious PDF — malware analysis report

Static analysis result for SHA-256 62a0732c3cf580a2…

MALICIOUS

PDF

71.7 KB Created: 2021-10-01 05:50:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6f5a734086c1270b4684b0a34018fda3 SHA-1: e1050acc60a78ff1aa71041a14cf8c57a7ac3a58 SHA-256: 62a0732c3cf580a2a871de4ad87e7cb29686325ebbd986d0d1eca217bb7b9809
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was flagged by ML classifiers and ClamAV as malicious, with multiple heuristics indicating it is a link farm and contains external URIs. The presence of numerous unknown URLs suggests a phishing or credential harvesting attempt. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards exploitation and redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://vico-domrep.com/ckfinder/userfiles/files/zabawotasixapo.pdf In PDF document text
    • http://nhatrangpalacehotel.com/app/webroot/upload/files/ramuxajixa.pdfIn PDF document text
    • http://www.bongbansaigon.com/uploads/files/tumedop.pdfIn PDF document text
    • https://strongpointmarketing.net/userfiles/file/bonovipujidijaxel.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/kezibexana.pdfPDF link annotation
    • http://autobedrijvenindex.nl/images/uploads/78760427264.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/zuxazi.pdfIn PDF document text
    • http://adriennemason.com/assets/files/10750770792.pdfIn PDF document text
    • https://www.carnesvarejo.com.br/assets/ckfinder/core/connector/php/uploads/files/fixurogaso.pdfIn PDF document text
    • https://dananeye.com/uploads/files/202109161356056166.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/zodorote.pdfIn PDF document text
    • http://hvezda-pardubice.cz/files/file/wavadizigotobisasada.pdfIn PDF document text
    • http://impactpluslearning.com/ckfinder/userfiles/files/95897918481.pdfIn PDF document text
    • https://tahuacoop.com/cms_gpadmin2015/sgi_userfiles/userfiles/files/xeterifemipobiger.pdfIn PDF document text
    • http://www.casasemio.com.br/ckfinder/userfiles/files/40345783445.pdfIn PDF document text
    • https://bandotrading.it/uploads/file/nanuze.pdfIn PDF document text
    • https://dancleland.com/img/upload/file/xixiwolikusuzeja.pdfIn PDF document text
    • http://stellarp.com/userfiles/files/80156244190.pdfIn PDF document text
    • https://www.agcontraincendios.es/ckfinder/userfiles/files/xoruzezumawexijojajuwola.pdfIn PDF document text
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/3fea11be835f5b1d8dad8ff0f340286e/54779886444.pdfIn PDF document text
    • https://halkapsikoloji.net/userfiles/file/pikeweverafesetasud.pdfIn PDF document text
    • http://fernandopelosini.it/userfiles/files/87897495993.pdfIn PDF document text
    • http://dison.cn/filespath/files/20210926031047.pdfIn PDF document text
    • http://osmed.cz/app/webroot/files/files/kabupapeviku.pdfIn PDF document text
    • http://bilcafe.it/userfiles/file/birewimarirosodilo.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/wirenuburozajokazevomel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=punjabi+song+download+mr+jattPDF 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_off0000b42e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB42E 17372 bytes
SHA-256: 0dc96ec8c3f038e2a7917811bc5c9eda232b3b928a6ef9411526e4f822fd301d
font_01_sfnt_off0000e059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE059 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF870 10916 bytes
SHA-256: 1d3c61d011b5904a7b767321411d2928a23e985386fcd676b7c4d4875b3bfd95