Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dd07de8a819ff89…

MALICIOUS

PDF

87.9 KB Created: 2021-07-22 03:42:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: d4a426077fe1e273232729ac571a63f2 SHA-1: 44f0ccfaead894bbc1e336987d73669294f72313 SHA-256: 0dd07de8a819ff89621fa4d7668ab5f5ebdf908fa7dbf9148427bfb20e83a115
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File Execution: User Execution

The sample is a PDF document that exhibits characteristics of a social engineering attack, specifically a 'ClickFix' variant. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting an attempt to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. The document's structure and heuristics suggest it is designed to trick the user into executing a command, likely to download and run a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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 http://shavers-boles.com/clients/7/73/73b1ad2e2c85410b7b015c0c79a6caf4/File/saxamemo.pdf In PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3024cc99de---42174960008.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/3hg94trare10kmgiibc3bh2sdi/tuzanijajub.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/emoqc9dcna66el1lkt50pur2g4/jikuvejiwak.pdfIn PDF document text
    • http://www.puhito.hu/uploads/jovixire.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/16094562b8db9b---rejubepukonugo.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/1e4083bcb875435505805ce7ee5123e6/85261818866.pdfIn PDF document text
    • http://littlefreddieking.com/clients/65037/File/74398673643.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/jexelorezomifipor.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/53130250016.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609679e49ac61---738090865.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021070803453349.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/eurkv7j1rjek2ie1rguq1vtqs5/39972481573.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0377e5cda4---56924490752.pdfIn PDF document text
    • http://www.novosib-sport.ru/ckfinder/userfiles/files/jogesibujamakul.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16080eba5b4ddf---60277933518.pdfIn PDF document text
    • http://tai-yang.tw/taiyang/upload/file/xevedivarodajavagetoxarab.pdfIn PDF document text
    • http://www.moyekolodin.com/files/gudusexajirujojix.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16070bcb7e8837---66196117094.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3a2cbeb86---95375808321.pdfIn PDF document text
    • http://jnafarms.com/clients/864068/File/gixit.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/zukusupisum.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9789d8eb4---voxulakigigiri.pdfIn PDF document text
    • https://sindonis.com/userfiles/file/delivamesori.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=pc+stuck+on+scanning+and+repairing+drivePDF link annotation
    • 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_off0000f2c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C3 10904 bytes
SHA-256: 93a103f2aa2a704080637c69b3e69188ad4305ba36aeab5ee97c3593d9ba1682
font_01_sfnt_off00010c07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12419 17392 bytes
SHA-256: bc44b2d38d6b1c7d98e5752301ff38fb8122ed0422863449442a5be94340918c

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