Malicious PDF — malware analysis report

Static analysis result for SHA-256 c784d2cda25d4bb4…

MALICIOUS

PDF

77.0 KB Created: 2021-02-17 16:11:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6af98ba5fade13faac4ed16322a8dfd8 SHA-1: 5c6129afba2b4e76cfa8593352c5a118dbfe2640 SHA-256: c784d2cda25d4bb48361bf3d7a1585443945ca206620764c7fcdaba1e4b4051b
174 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including suspicious links and link farms on disposable hosting. The presence of invisible links and a 'download button' lure suggests an attempt to trick the user into navigating to a malicious site. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bologen.ru/aws?utm_term=best+camera+lucida+app+for+android PDF link annotation
    • http://buyfastedcircle.xyz/bepimasurusijifizezevuhbd8o.pdfIn PDF document text
    • http://yoga-italy.space/24206486631ob6nr.pdfIn PDF document text
    • http://timurberg.ru/17754168819agmnm.pdfIn PDF document text
    • https://cdn.sqhk.co/bikegola/hhjdjfd/nuxobebopedawasudulate.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzefegevo/KhhjjJr/3130482707.pdfIn PDF document text
    • http://experiment.website/lolanozqnzm4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371013/normal_5ff0eac63ae25.pdfIn PDF document text
    • http://ellmax-site.xyz/990610105792mwyh.pdfIn PDF document text
    • https://cdn.sqhk.co/razefudixid/XIRXwKo/77661668230.pdfIn PDF document text
    • http://com-login8.xyz/excel_2010_bedingte_formatierung_formel_kopierenx61i6.pdfIn PDF document text
    • http://yyyyyyhhhhh.space/history_of_the_world_part_1_movie_cast3p1ok.pdfIn PDF document text
    • http://weareanonymous.org/brother_day_2019_whatsapp_statusdz6l1.pdfIn PDF document text
    • http://myyshooop224.site/11923881593x1vf6.pdfIn PDF document text
    • http://goossyy.online/vijokedunujulegegutowote8sosa.pdfIn PDF document text
    • https://cdn.sqhk.co/jokawefezo/9jdiiJm/spellbinders_dies_nz.pdfIn PDF document text
    • http://meetly.space/66662172569x80bl.pdfIn PDF document text
    • http://help-nanny.site/10813849950unalm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pejigevug.rf.gd/reportage_arte_banlieue.pdfIn PDF document text
    • http://punegejofuj.epizy.com/gukasifiwanifojulet.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_off0000ef0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0F 5348 bytes
SHA-256: 6f38b108bfc53f2ca32fc3089e69b569b65c70f69d911a89bdefaab5dd033d8d
font_01_sfnt_off00010128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10128 11028 bytes
SHA-256: d0d9e995f4d3c358bb256a15ef465e416c931366d60a9e0d46fc09ec0cdaf68f

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