Malicious PDF — malware analysis report

Static analysis result for SHA-256 2caf2608f7fc4485…

MALICIOUS

PDF

71.2 KB Created: 2021-09-08 00:07:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1b20977764c1cb3f8f7958bbde036a44 SHA-1: d7064aa6bde4c9a5b0cce4eedf65ebd844a541d3 SHA-256: 2caf2608f7fc4485cb1f0a24431898774fa1566e6ba95b5c5e1ca0a4699b64a7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a phishing or credential harvesting attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are characteristic of phishing lures, often leveraging embedded JavaScript for obfuscation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 https://smartcrm.cloud/upload/files/fokabijumexisuz.pdf In PDF document text
    • http://sunriverps.com/data/editor/file/99317977649.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c98311ba18---pavixovapozazosemula.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/98873316459.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/buwovo.pdfIn PDF document text
    • http://krakow4you.pl/krakow/files/bijuranadosuwib.pdfIn PDF document text
    • https://indobaliart.com/sitefiles/file/80265663107.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/1e2fa191fe08ee4ae395e398c99f17f9/18074021766.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/ho8f63e7c7jnmo5pshf681hfn7/37311132453.pdfIn PDF document text
    • https://fobh.net/userfiles/files/jeluvanelipas.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/1d543076f1a02eaefb1745c141197533/boxodasatokarupa.pdfIn PDF document text
    • https://karapinler.com/calisma2/files/uploads/48752179111.pdfIn PDF document text
    • http://www.trafikyaren.com/wp-content/plugins/super-forms/uploads/php/files/45nvnpg3cejfjden0gdneubgv4/73154468738.pdfIn PDF document text
    • https://linhngapt.vn/upload/files/28606182007.pdfIn PDF document text
    • http://poiskvod.ru/images/file/luwudepawigu.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/8jgkgrigc0t3g36prudmsf6uhq/72470202562.pdfIn PDF document text
    • http://tvoirostov.ru/ckfinder/userfiles/files/27396850549.pdfIn PDF document text
    • http://fly.no1-yes.com/userfiles/file/vinuzorinavigerebidojoki.pdfIn PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/79900070297.pdfIn PDF document text
    • https://tourgardan.com/basefile/tourgardancom/files/88294030414.pdfIn PDF document text
    • http://dansungsala.com/uploads/files/rapuxupugidanojibimu.pdfIn PDF document text
    • https://408of53crownstreet.com/assets/media/files/81471043168.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/vewewigukakaf.pdfIn PDF document text
    • http://jinwoosmc.com/userfiles/file/7138543014.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aacf298af97---dezitelolin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=citizen+participation+in+community+development+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_off0000b6f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6F4 15132 bytes
SHA-256: 2578e7f47312423a5605d3900fd40620decd51d8a82d71c037aa855bb25942cb
font_01_sfnt_off0000dd3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF552 10984 bytes
SHA-256: 45976a8a753416a49565d25ec960d0152c4156905cffe840b8692a86c6daa703

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