Malicious PDF — malware analysis report

Static analysis result for SHA-256 326348b3a67e19a3…

MALICIOUS

PDF

80.6 KB Created: 2021-09-01 03:47:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 49986a47d7ebb00e095bc35a7a27b6af SHA-1: 7ecf8ca60568f0dfd673c85eb6788566d68f873e SHA-256: 326348b3a67e19a30e29935c9f6eee16da6425f7f701a9a740ffa58b3e4c6881
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous URLs pointing to potentially compromised websites or disposable hosting, likely to lure users into downloading further malicious content or submitting sensitive information. No scripts were extracted, but the PDF structure itself is designed to facilitate malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://drafthe.ru/uplcv?utm_term=bring+it+on+home+to+me+sheet+music+pdf PDF link annotation
    • http://craft-personal.de/userfiles/file/19152193102.pdfIn PDF document text
    • http://yetisirkaucuk.com/firma/files/fozoguzopitepoza.pdfIn PDF document text
    • https://bucatariizidite.ro/printuri-fi/files/telil.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/95cc74ab65c69e45142aedad842eedb2/93660787973.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/knvaitagind7b3g58crc8qhf85/34146611795.pdfIn PDF document text
    • https://gabinetpro.pl/kosmetyczka/krakow/files/15985629672.pdfIn PDF document text
    • http://urbancollab.com/userfiles/Proj_Name//files/15728049979.pdfIn PDF document text
    • http://skikk.nl/app/webroot/files/userfiles/files/70245271360.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088ba3f78160---51504061983.pdfIn PDF document text
    • https://shiokuda2.com/contents//files/44130099286.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160c89257d5154---92081741459.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/dkk6e32vqo3cbq37ae1ns12tbl/nanafufopazupefa.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160f0ea497c3a3---55923640676.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/0cd157aa493d1688bfe860f3a6307c98/77788253808.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/907e8c9afad5a32d448da14c9943870a/jovitodunibeloje.pdfIn PDF document text
    • http://dlt-nkp.com/fileupload//file/11429650225.pdfIn PDF document text
    • https://circolodelpistone.ch/userfiles/file/rujepigejamifipolejibaj.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/zopewuxexavaxotubopej.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087860960cde---nekitarasom.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/4013628527.pdfIn PDF document text
    • https://juniorclublivorno.com/sitonews/images_upload/files/10608777153.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b994dc4cedc---61573256359.pdfIn PDF document text
    • http://sushistoryus.com/uploads/files/62746897578.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8fb494044---56457831650.pdfIn PDF document text
    • https://clubesolbra.com/uploads/files/xejobubonesi.pdfIn PDF document text
    • http://e1pl2.nazwa.pl/busy/fotki/file/56603129904.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_off0000d6c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED9 11012 bytes
SHA-256: ea26e136465474bfb9fd259652db1bdb2b87565e78cf55efd017e83fc12bcff4
font_02_sfnt_off00010810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10810 17092 bytes
SHA-256: 4431e35068f5451bd28b6af130d0f6db53b2e0eec72c7276ad8274f230d4f2de

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