Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a29d5e0fcadc2c3…

MALICIOUS

PDF

86.3 KB Created: 2021-08-01 15:56:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: aa364605aea4a47a2b253e864372f2e6 SHA-1: b72c20ecee5e317a2fdd5e94fd42f7ae6233b05f SHA-256: 1a29d5e0fcadc2c3494b1e0711a3c5b9640d1e353f6390667091ec0dec82ba84
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which point to domains identified as disposable hosting or compromised CMS uploads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, and the document body was unreadable, but the link farm heuristic is sufficient to determine the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 http://jdhs77.com/clients/58520/File/zajogagipebatetug.pdf In PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c5af56ae8---60562970162.pdfIn PDF document text
    • http://go-pxl.com/uploads/files/30762228288.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607debcc92027---fezekavezuxuvuzov.pdfIn PDF document text
    • https://uclerbaklava.com/resources/file/29830686515.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a116bb5b748---58634167363.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cdb5489675---nobogifibotegodo.pdfIn PDF document text
    • https://novzelandiya.ru/ckfinder/userfiles/files/75698965575.pdfIn PDF document text
    • http://maiodi.com/userfiles/files/22145762126.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160ffe42c3418b---86810834042.pdfIn PDF document text
    • http://obchodsezlatem.cz/upload/files/27453290257.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/19453952345.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/c9022903a75cf98920063dee8e3d046e/61897878767.pdfIn PDF document text
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/qsgv90btr92e6g4mj9ubv7moke/95202218140.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607458bd4915c---gefarimuxiluwipegulovo.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/23tlcb5p6jkl7kfmphp1plfgs0/48083820927.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/qdtbes03ia25urqmsukm8jbi12/58233023333.pdfIn PDF document text
    • http://www.valathors.com/ckfinder/userfiles/files/17038918398.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/korg46clketic5fesmbo3khufo/43804304750.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d071fd16054---vijutewokemewenixe.pdfIn PDF document text
    • https://soccerauquebec.com/userfiles/file/rumiliwogaxubojokexif.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/6h400m90osm9iutcm84lp4a1o2/xamenebuxewogixixapu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=cuaderno+de+actividades+para+tercer+grado+de+primaria+primer+trimestrePDF 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_off0000e7c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C0 19172 bytes
SHA-256: 72b3719ebeec3c9e6de19983deb4e14662ce747ab75de1a54fcda81b6b498e4a
font_01_sfnt_off000118f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13108 11008 bytes
SHA-256: 397097a1c910b6c2fa46a0e3d22a5b582309a0f64dead95321078427302d7604

Open this report in the interactive analyzer, or submit your own file for analysis.