Malicious PDF — malware analysis report

Static analysis result for SHA-256 b130aafd265c7147…

MALICIOUS

PDF

84.6 KB Created: 2021-07-18 20:01:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: fca71591cf3e9543328ec101b35a7d02 SHA-1: 34b80b14d31044abf9fccc7a0cb83d9b034102d0 SHA-256: b130aafd265c714759c4f9ded10c2a7fb30bc0b69d48b7d97732b5a7d9167395
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely contains malicious content or exploits. The document functions as a link farm, directing users to numerous external URLs, some of which are hosted on compromised WordPress upload directories. The primary purpose appears to be to lead users to potentially malicious content or phishing sites through these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://codecs.ro/images/file/takupede.pdf In PDF document text
    • http://afghansolar.com/userfiles/file/zezedebejod.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/dutuduxukifusomuga.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608c26b19086f---59847306457.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/75753e4a3418a265e3ce100bb75b0251/69317043234.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb45913bf9---16461144594.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/wiwazob.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c5e921c62---59645293252.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/h1d7b972itk0tgtk58197sv9eg/zajunikexutapu.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/nigek.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/vrvq1k3cipjjmee5trosqp0j21/xawobevajafaxusexere.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/0de90f2c222c54786725dcead07afe9f/56101444744.pdfIn PDF document text
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/63463226781.pdfIn PDF document text
    • https://maintogelonline.info/contents//files/62162855782.pdfIn PDF document text
    • https://ceral.pl/ceral/pliki/file/77973551387.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/jm9e7bfluvp253mqnqp15c3mtb/74811890870.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/sixixavubovizevawovoregi.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/902688400.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/88347a3ecd5521a0e5c43a978026a607/69528825034.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/72209087390.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=cdl+school+bus+test+questions+and+answers+pdfPDF 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_off0000e56d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7F 17424 bytes
SHA-256: 6981965b0d2073ba7c77dee9068b31c418669dcfadd4a0a53d48cdf03ddcbda2
font_02_sfnt_off00012b3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B3D 11220 bytes
SHA-256: 6308b28dcbcfe2b27d34c79feb7bb2943ea281d466467925fc611cd4205ea4aa

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