Malicious PDF — malware analysis report

Static analysis result for SHA-256 b94a58aef61b1a2d…

MALICIOUS

PDF

94.6 KB Created: 2021-09-01 06:11:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 56e8dbdbe83a7d6c50ffc08617d899fc SHA-1: 94455d9c55b5fc62f495687493e4d2192872edb7 SHA-256: b94a58aef61b1a2dd382e7b2bf5962f92c8ed8abb0a8d27ec2b2b209844ffd26
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These links are structured as a link farm, suggesting the primary purpose is to redirect users to malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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.
  • 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://pixomot.ru/uplcv?utm_term=ink+and+screens PDF link annotation
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c110ed6d79---98980677156.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/bedaxox.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/salajemegoliko.pdfIn PDF document text
    • http://radiopoint.cz/userfiles/file/jiwesusuvakokame.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160812f56c6f91---27174235685.pdfIn PDF document text
    • https://bio86.net/fichiers/4955712353.pdfIn PDF document text
    • https://wipaphun.com/UserFiles/File/xirafagofotarup.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a714283d891---vagek.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1610e9bb72fc63---sagolaxidop.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608212cc1090b---purogo.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/pakixebizafe.pdfIn PDF document text
    • https://hrmconsulting.biz/upload/files/pidudatur.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/6176805074.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609c694006db5---29806789543.pdfIn PDF document text
    • https://okinawa4d.com/contents/files/54479896186.pdfIn PDF document text
    • https://steammining.com/userfiles/file/mebinoxigejabika.pdfIn PDF document text
    • http://clarkhigh72.com/clients/3/34/34275c7d49a174b5f6cf03bf5966da6c/File/wazekazatazarijilib.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6d6kqglf74aoqnqj5jjpso3aq3/64390384283.pdfIn PDF document text
    • https://macauroommate.com/ckfinder/userfiles/files/gunabomefapirat.pdfIn PDF document text
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210722093115.pdfIn PDF document text
    • http://rhondachem.com/d/files/52161699528.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/h2vrrtsl5g37lmg31u50sts3jn/72197343636.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/olin2tb6ufoca37m1rhs4662v6/sividizuxawig.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608cf1d59efce---4868965638.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/fadip.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_off00010fac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FAC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000127c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127C3 10048 bytes
SHA-256: e9af2afa3763b7e7e5d36a761dd3ed642f4838f156f69ca845c14f2782361f97
font_02_sfnt_off00013e30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E30 17628 bytes
SHA-256: ca60b901393df0019088d30dbdc092bb2eefb84a31908baf3c812146ffa8abe5

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