Malicious PDF — malware analysis report

Static analysis result for SHA-256 1149d1250b115ecf…

MALICIOUS

PDF

81.7 KB Created: 2021-09-08 04:32:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6652f996fed4aa645b4afafa7db7a241 SHA-1: 75f57c54b2fe0fc90fd7310d968c221c670ab3f9 SHA-256: 1149d1250b115ecfa1598a4fa1155b37264a3b9e77ff9531cab232e3a9a7204c
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable domains, indicating a link farm designed to lure users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://rgjbreunion.com/clients/6/69/6950e03db8b1ea894755b369f0a03c31/File/kalorovopawuzovigonuvo.pdf In PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/4a717974e1b0173e0eb3fddc72b6fb72/janezelozas.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cefc4d4072---xetelajozuxerik.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/a9a90e978f7780d4bdd7e04e571ebcfa/61702697918.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3f88a743ce---3347621536.pdfIn PDF document text
    • http://abogarestudio.com/userfiles/file/guxixujed.pdfIn PDF document text
    • http://studioguatta.it/userfiles/files/gezavo.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/57080be5ee8cdf25d9fd994eb62fafe0/momepo.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210505073002.pdfIn PDF document text
    • https://auto826.vnpec.xyz/uploads/files/30715229596.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/lenabedojeloze.pdfIn PDF document text
    • https://itacademyindia.com/ckfinder/userfiles/files/93652732601.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/140b5c9111f2313a549b631e32968ebe/63380034784.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16095953012616---41373513230.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/81302004872.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/93486944139.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609829d60a733---figokodisavimewuku.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/da2979ad819de573fd598c0061d04bcf/66650518434.pdfIn PDF document text
    • http://deltools.com/userfiles/file/nugetokoso.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/2425201263.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a922d8099a0---20710308306.pdfIn PDF document text
    • https://abouelhoulgroup.com/userfiles/files/24434425685.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=relational+database+design+pdf+downloadPDF 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_off0000da44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA44 10844 bytes
SHA-256: 07b81cbb660aa8e34e7dfd8b1c319f4bdee2b1f415a4a50f0b701f78e6905f89
font_01_sfnt_off0000f304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF304 17612 bytes
SHA-256: 633a769e0adc177336fec0a74b1a42f18cdddcce676e4ebeb50470cf30bc8c1c
font_02_sfnt_off000120ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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