Malicious PDF — malware analysis report

Static analysis result for SHA-256 038fb2e2228f795c…

MALICIOUS

PDF

92.0 KB Created: 2021-07-26 01:54:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 576a47884639ccb5dd146b0e54544ec9 SHA-1: 66a48902dd80b30c66f428c9bbaabe2dadf8ea2b SHA-256: 038fb2e2228f795c16d790c791d5a5177dd5ae0ea0d96d9158297b9ab48e782c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are characteristic of a phishing campaign aiming to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160948462a598f---zevidufilimej.pdf In PDF document text
    • http://www.electricman.in/demo/frontend/web/uploads/files/4229276522.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021050506112831.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d12c0aa3f---12044375253.pdfIn PDF document text
    • https://semineebrasov.ro/printuri-fi/files/roxanomonudodipulebusoju.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/32cdcca60597655fc8db904bfc19334e/48090830620.pdfIn PDF document text
    • http://ergo-logo-bamberg.de/userfiles/file/1290781905.pdfIn PDF document text
    • http://hengtaixin.com/HangShun/ckfinder/userfiles/files/xekodiwetu.pdfIn PDF document text
    • http://omak1968.com/clients/71178/File/lararesesu.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea7714388a---jedokufumi.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/uu9dob3ipqt4j84rmnmr3kcng7/kadivazogedowen.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/2fdf5fcb053645523be9938467d2be6f/votekuvasukut.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160859980db3a5---pumijixifofusasonavide.pdfIn PDF document text
    • http://xn--80adpfaaeictf0c6c7i.xn--p1ai/public/file/gorukufojepujalotixelujo.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/20866962342.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a484d7abb79---kitukoxebedesekok.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/5e1498d86cc186ab348c4119f2bb676c/vajelulebilepot.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160c2287bd1367---86269901571.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/71189016445.pdfIn PDF document text
    • https://noriupapildu.lt/ckfinder/userfiles/files/nukuxo.pdfIn PDF document text
    • http://op-gold.com/ck_image//files/xipiwivesuj.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae97eda508---bobekamesuwital.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fda00a5971---gofofen.pdfIn PDF document text
    • http://richfield1960.com/clients/865265/File/72789872931.pdfIn PDF document text
    • http://alliance-ic.ru/uploads/file/22892437431.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=kickin+it+season+3+episode+21PDF 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_off000104b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B6 10788 bytes
SHA-256: 612f44424fa35308e14af2ff5cf83c92de0207948cb1df3bf82bfce8ea031787
font_01_sfnt_off00011dd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD2 17048 bytes
SHA-256: 7654849b8b618fc30b2506d54ea14fce47f3ca94add654b763729e60d3e5da40
font_02_sfnt_off00014a17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A17 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1