Malicious PDF — malware analysis report

Static analysis result for SHA-256 49310ae4a9477f45…

MALICIOUS

PDF

82.5 KB Created: 2021-06-25 22:06:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 804f5645171120c548b273b115fe29df SHA-1: ed062b83acf58c5f6a9f368ea9d7a38dffaa57fb SHA-256: 49310ae4a9477f45f3e1205cf0529be4a7e7610aa498a4eecc7d9c6d14257593
164 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and a large number of external links, many pointing to compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to phish users or distribute further malware via the numerous redirect URLs. The embedded JavaScript is a common technique for initiating malicious actions within PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://medvor.ru/uplcv?utm_term=tom+and+jerry%27s+photo PDF link annotation
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/25d8at329cbsebnrbcienv8er1/nuxefupojaxujiwezevivene.pdfIn PDF document text
    • http://10glazsikeyrosa.ru/file/99865058518.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606f90851fc89---mepodawarerudofofe.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607067c1de35b---76000571528.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ff0b4c79a---pojaguma.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/8440646a0886c154adbbbc48dc823a6b/72344283587.pdfIn PDF document text
    • http://gocreate.termall.pl/upload/fck/file/vawimetu.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/d5f632ead6557ca960f170624eb716f4/daxunovizeninoz.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/52931db5832edb04ad2518ba3b0b20e2/8027683164.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/nukasebene.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/c0055ef2678ec9e58581e88608eb3a02/pekixaleba.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160be50d606544---kavolewitosone.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc12b666fc---xejofo.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160acf2bedb75a---jaxevadalegu.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/od3ssbuj9ui7fbq64b9d3eumej/57300612851.pdfIn PDF document text
    • http://ventiliatoriai.lt/js/ckfinder/userfiles/files/56304085872.pdfIn PDF document text
    • https://folklorebridge.eu/uploads/pictures/files/semopemijafamesidojixebe.pdfIn PDF document text
    • https://vieclamday.com/userfiles/file/xipewobatojujeripanagiki.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a14e7971e1---98528906296.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/73850093335.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/205b4b13a2d0e0388d43f90cd8dba33e/mamuludijiravurul.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/88803118807.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/5276997413f4572eee5e82c3c00db7b5/46234812699.pdfIn PDF document text
    • http://location-appartement-venise.com/italie_documents/files/lisurupasogejepibe.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB9C 16440 bytes
SHA-256: 3f365925e8150fa06457c535f50363b2a2c15b2c6d8b4c0542db041e6d89a679
font_01_sfnt_off0000f646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF646 10760 bytes
SHA-256: 5451e09a45398fbe5571177e3ca1cd8c7f7bd1e85e7b827db157f54d59249e4f
font_02_sfnt_off00010eee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EEE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000126ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126FF 16132 bytes
SHA-256: eb83fb48a2f60ac59fad768156047f025764cad4052c8f34695a9c8dd2456ad8

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