Malicious PDF — malware analysis report

Static analysis result for SHA-256 19a2686a56aaf91c…

MALICIOUS

PDF

85.0 KB Created: 2021-09-09 10:07:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 87774dd0f0b7fd9bee9b532ea962e0da SHA-1: e9d714ef279dc1cf37b33ca0d9633e85320d2f01 SHA-256: 19a2686a56aaf91cf90931285b00b29817ae9895ed5ea9c8d38eb700034b25d4
176 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous external URIs pointing to potentially compromised websites and IP addresses, suggesting it's part of a phishing or malware distribution campaign. The document body is unreadable, but the heuristics strongly suggest a link farm designed to redirect users to malicious content.

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
  • 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.
  • 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://smidgel.ru/uplcv?utm_term=how+to+get+out+of+a+private+parking+ticket PDF link annotation
    • http://baloneacessorios.com/_upload/file///74306259425.pdfIn PDF document text
    • https://sahyadrisevasanstha.in/userfiles/file/wikoloporotunob.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/1677d3d9e77c93e45335e030a0f9cf9c/92746004081.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.net/ckfinder/userfiles/files/83798016482.pdfIn PDF document text
    • http://abovomedia.hu/_user/file/xalugag.pdfIn PDF document text
    • http://dlabiura.kbo.pl/ckfinder/userfiles/files/kasifo.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/41703285389.pdfIn PDF document text
    • https://g55net.com/webpagebuilder/ckfinder/userfiles/files/32201072393.pdfIn PDF document text
    • https://www.rosebankprimary.co.za/inc/ckfinder/userfiles/files/numuzerukul.pdfIn PDF document text
    • https://prevodi-plovdiv.com/userfiles/file/50385882551.pdfIn PDF document text
    • http://amdind.com/userfiles/file/modekizebogufizak.pdfIn PDF document text
    • http://sxnqx.org/upload/file/Fl202109030648251899.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613342a7d291e---27660013275.pdfIn PDF document text
    • http://claudiamelchior.it/images/file/somotasumeredemabebe.pdfIn PDF document text
    • http://alessandrobelleseveterinario.eu/userfiles/files/xevug.pdfIn PDF document text
    • http://140.121.161.111/ckfinder/userfiles/files/65228100857.pdfPDF link annotation
    • http://fsgzb.com/upfolder/e/files/20210906105717.pdfIn PDF document text
    • https://giltmorestukko.hu/ckfinder/userfiles/files/sotugivupagud.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/b5b3526b560ca28163e86130fddcd085/mowepizoxogokejanozat.pdfIn PDF document text
    • http://liweisteel.co.th/ckfinder/userfiles/files/sesowelemadusirodiz.pdfIn PDF document text
    • http://zzfcw.com/file/fkimg/file/jatuwadakupitisatu.pdfIn PDF document text
    • https://bunianco.com/other_files/File/lademogo.pdfIn PDF document text
    • https://groupburuemas1.com/contents/files/18974924079.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16131506a3e469---jojiboteriwobideruwu.pdfIn PDF document text
    • http://flapboxes.com/userfiles/files/lifutali.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_off0000e70e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE70E 10776 bytes
SHA-256: 45be1dee8dde9d367cf5ace07464098ed87ba27e83be95e0ffd17d84e4701687
font_01_sfnt_off00010013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10013 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11825 17912 bytes
SHA-256: 0809c6adbb2ec5177c54921d717286e9013c1425cd3a0c393e410fe24d985f43

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