Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6be4e65f9dccf2b…

MALICIOUS

PDF

81.1 KB Created: 2021-09-21 01:06:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 57929c20a9911ab1487d8432c788a872 SHA-1: b7dd4b64cbe42b20ec6b8dba5496359092339220 SHA-256: e6be4e65f9dccf2b573131dab45a14b4c954654130984a0714e2825abc3ae7f6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or are part of link farms on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or delivering a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://huntic.ru/uplcv?utm_term=redmi+note+pro+price+in+bangladesh+2021 PDF link annotation
    • http://pawsandtiaras.com/ckfinder/userfiles/files/mekopolo.pdfIn PDF document text
    • http://sanchariglobal.com/userfiles/file/22412017581.pdfIn PDF document text
    • https://lanna-flyingclub.com/ckfinder/userfiles/files/sepubamufoxiligudawi.pdfIn PDF document text
    • http://adice-area.com/pictures/files/91190014619.pdfIn PDF document text
    • http://inbjnews.com/data/cheditor/0603/files/gitoxarira.pdfIn PDF document text
    • https://hglobaltourb2c.com/FileData/ckfinder/files/20210913_82AF92F176F84767.pdfIn PDF document text
    • http://alsace.annuaire-regional.com/ckfinder/userfiles/files/mifapavexusofazax.pdfIn PDF document text
    • https://colegiumaniucarei.ro/ckfinder/userfiles/files/43130259423.pdfIn PDF document text
    • https://smwebtechnology.com/arishayurveda.com/userfiles/file/51281571899.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/a3e742a0b8605550b1a7d4d6aaeebff8/tolowanufuxenudu.pdfIn PDF document text
    • https://gemma.lucien-sv.info/uploads/files/613da2863f3d8.pdfIn PDF document text
    • https://www.meditech.cz/ckfinder/userfiles/files/noxokabefawo.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ef0d00574c---26126383434.pdfIn PDF document text
    • http://zhouzhuanx.com/v15/Upload/file/202194225133307.pdfIn PDF document text
    • https://brune-schmuckwerk.de/ckfinder/userfiles/files/bakakijixatamex.pdfIn PDF document text
    • http://wwpokebar.com/uploads/files/xamawologomudaroniped.pdfIn PDF document text
    • https://kimcert.com/E/file/vedujikivap.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/talixeburonafuf.pdfIn PDF document text
    • http://dlastudenta.org/Upload/file/jerufo.pdfIn PDF document text
    • https://astoraccessories.com/uploads/ckfinder/files/9521415611.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161331802e7cff---62653552511.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137e368cca5b---51181995746.pdfIn PDF document text
    • http://billsky.ee/files/file/xisizolivuvemuberudexu.pdfIn PDF document text
    • http://sireny.net/share/files/zutuduze.pdfIn PDF document text
    • https://moulindelarroque.com/userfiles/file/laladujid.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_off0000d830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD830 11440 bytes
SHA-256: 0f3ad9d556ba0ea233d643f1154e23e10464359eb57be49011199e0b6e76edaa
font_01_sfnt_off0000f29d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010aaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AAF 16968 bytes
SHA-256: a471dc4640f44eb9aac4d26c696b5d5d3f5e9d87e9d29efa568e9a1b25fd7eb8

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