Malicious PDF — malware analysis report

Static analysis result for SHA-256 073bfc123d6e426c…

MALICIOUS

PDF

80.6 KB Created: 2021-06-28 15:09:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f39dc96cb7893ae9bb40246ba28f909d SHA-1: f18a82ac4d84a25685a51022cf2be7003f2ade17 SHA-256: 073bfc123d6e426c76461b9afbdfd0571adce9663aad4325ed693d40a99d5b3f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of 'utm_term' in one URL indicate a phishing or scam attempt disguised as legitimate content. ClamAV detection and ML classification further support its malicious nature, likely as a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://nomylo.ru/uplcv?utm_term=pony+printable+colouring+pages PDF link annotation
    • http://language-coach.pl/uploads/files/59270167932.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16090bf5d09248---25675843068.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/kutunanumefagudef.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/kaboropaxisarupobid.pdfIn PDF document text
    • http://alfavs.eu/userfiles/file/89337559862.pdfIn PDF document text
    • http://mp-journal.com/media/file/jesazil.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7e0f6f8a3---32144728912.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdd687a04dd---pewanokeb.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080be5b1eb08---kepudegibekegupolezup.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a463a101207---wubofeda.pdfIn PDF document text
    • http://mobilesamara.com/img/files/file/jepadadidasupenivasowuz.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/re7obp3uqgo1u4569gli70fqtd/mebegepojekikodewufix.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea4ac4194b---vidokifaf.pdfIn PDF document text
    • http://mmdplus.com/userfiles/files/20210601_034300.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/sajodasatijarefowezidew.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/58590989383.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/fc38674c47b9cf3598a008bec6e4b691/61793120642.pdfIn PDF document text
    • http://textingrights.com/userfiles/files/namixujoga.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba0cb10853d---xotawatuzimolitejez.pdfIn PDF document text
    • https://nabsangram.com/userfiles/file/43144174457.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/37321733954.pdfPDF link annotation
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/de7a74503c48882ee3398a8650c7ad05/sinagaxasedisakawolu.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/m17623ohmkvu5fpivv5e0lsrk2/nikoxawebumamaxix.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/a98598a5f71dfb4b625d7e77bf0417b7/nesufufovatinumelexo.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085a45a25245---tivamedodazagabawovizi.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD857 10904 bytes
SHA-256: 3a818d1b9b6117c5935434ae5d6bef9ffd249335352e8a0cb48e619506c4f1ae
font_01_sfnt_off0000f182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF182 16692 bytes
SHA-256: 1fdd0b4aa3ffab97cc57124d22cf9ab783a5d2362a332798fb2d10340e928493
font_02_sfnt_off00011cf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CF0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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