Malicious PDF — malware analysis report

Static analysis result for SHA-256 1326b0d2e6f31347…

MALICIOUS

PDF

85.1 KB Created: 2021-09-18 17:25:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: dbf5c010199815e55d651ede3378471d SHA-1: 6e1f2ae4f5e76a1b061d5b821c19efb7f8fce5f3 SHA-256: 1326b0d2e6f31347eefe7cdd3db26b718cae8e8ea6aa84c03f0a1aac13f74f3e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is part of a link farm designed to redirect users to malicious sites, with one URL specifically mentioning 'hack ios'. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were directly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://smidgel.ru/uplcv?utm_term=kick+the+buddy+hack+ios PDF link annotation
    • https://rajatotogroup2.com/contents/files/78205935346.pdfIn PDF document text
    • https://actsonics.com/uploads/files/202109110218033434.pdfIn PDF document text
    • http://swiss-ex.com/images/blog/file/janegarunevip.pdfIn PDF document text
    • http://www.biogreeno.com/cms/ckfinder/userfiles/files/zizewokevakagokodizojub.pdfIn PDF document text
    • https://apartmani-mestrovic-krk.hr/files/gapagebogasoladapado.pdfIn PDF document text
    • http://hindustanadvancedsolution.com/t/tutorfirm/uploads/ck/files/nidexire.pdfIn PDF document text
    • http://hindustanadvancedsolution.com/t/tutorfirm/uploads/ck/files/13016249147.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/e57e8f570c79c6d08f04a90874ce4128/sirasubalema.pdfIn PDF document text
    • http://metisentry.net/ckfinder/userfiles/files/kamilitotis.pdfIn PDF document text
    • http://zhouzhuanx.com/v15/Upload/file/2021918550223396.pdfIn PDF document text
    • http://liveranigioielli.it/userfiles/files/89565707561.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/18312071478.pdfIn PDF document text
    • http://manpukuorder.com/uploads/files/lezusulujagadogut.pdfIn PDF document text
    • https://priscar.com/documents/files/37048387215.pdfIn PDF document text
    • https://maritime-models.com/userfiles/file/28054452934.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/bca04f49716973e43fea3c603fb6f4a9/69640196228.pdfIn PDF document text
    • http://hotelniagararimini.eu/userfiles/files/21830012974.pdfIn PDF document text
    • https://www.assofmt.org/ckfinder/userfiles/files/bemiforokemukore.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/f2173aead85c30df6b0869c6561bc0fa/gusagejerezazimefabido.pdfIn PDF document text
    • http://autoscuolecasetta.it/userfiles/files/65352972894.pdfIn PDF document text
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dogojujejojeparag.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/161328b21c54fe---vozawiwi.pdfIn PDF document text
    • https://propage.q-cloud.net/upload/ckeditor/pages/files/sewizogit.pdfIn PDF document text
    • https://lapdonline.org/file/xedufinekajexufisaki.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://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_off0000dd97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD97 21600 bytes
SHA-256: 8972e66353e686221fd494cb427aca6d2b546d30f4dc154a8a52b164747847ec
font_01_sfnt_off00011614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11614 10656 bytes
SHA-256: c4fe55b584987c50277deaff8cb01031c9071254a202079ea152e58e9d8dc595
font_02_sfnt_off00012eb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EB0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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