Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8008085a5d0c331…

MALICIOUS

PDF

73.7 KB Created: 2021-09-08 17:12:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 32725567aa6a001f0a561ae091d58166 SHA-1: f48cf570bb2aa4f307f13885d9ccda9181949b65 SHA-256: a8008085a5d0c331f42e59499e29c2cf11be78d9eaeeaba48bcc4f2a3d080c01
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised websites, suggesting a phishing or credential harvesting attempt. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security. While no scripts were directly extracted, the presence of external links and the overall structure point towards a malicious intent to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://www.prshots.com/ckfinder/userfiles/files/33579308925.pdf In PDF document text
    • https://upaspor.com/resimler/files/dasalogewidadiso.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/925ff873cbd04846faf61fdf5d42ed94/53168441524.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/909d257f7f5a592d6745e5293e1cabc2/29814905340.pdfIn PDF document text
    • http://avision-italia.com/userfiles/files/fapiritamukajaberiw.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/45367705767.pdfIn PDF document text
    • http://xn--hy1bt45apoap01a.net/jangheung/userfiles/file/pixerav.pdfIn PDF document text
    • http://studiorapizza.it/userfiles/files/laguwafowudezedigupu.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/b14180d0c31a8cbcdeaee98e9942b7af/62980008217.pdfIn PDF document text
    • https://surupaceanu.ro/ckfinder/userfiles/files/budenijafotaj.pdfIn PDF document text
    • http://drigungkagyurinchenpalbarling.org/upload/userfiles/files/xonawukukeke.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134926ae72fc---fusaze.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/b444142617d09c034080391b871f3d69/mawifimonis.pdfIn PDF document text
    • http://smartpaintingplus.com/userfiles/files/4565086711.pdfIn PDF document text
    • https://stillwaiting.org/userfiles/file/gujuboruzimujija.pdfIn PDF document text
    • http://clickvay.com/upload/files/palamup.pdfIn PDF document text
    • http://nyett.hk/uploads/news/files/lefowu.pdfIn PDF document text
    • https://dichvuhappyhouse.com/upload/files/9528865415.pdfIn PDF document text
    • http://zeci.nl/im/image/navosiji.pdfIn PDF document text
    • http://headlinesdinerla.com/uploads/files/vemivevaxekox.pdfIn PDF document text
    • https://degardo.hollandpazsit.hu/ckfinder/userfiles/files/53001527701.pdfIn PDF document text
    • http://fueandhair.com/userfiles/files/fomuvesunebixigikudis.pdfIn PDF document text
    • http://puginternational.com/ckfinder/userfiles/files/13321002301.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/6e74a83b20370494a1d7129189fe5834/32772670307.pdfIn PDF document text
    • https://tsydesign.com/userfiles/jws/files/58238232335.pdfIn PDF document text
    • http://aapltd.net/userfiles/file/dovijufigamaxasevajar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=uluslararas%C4%B1+deniz+hukuku+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_off0000bc0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC0F 17136 bytes
SHA-256: 75ba8234b3b691b337e9ce88a16604aaaf65fd06f848d3c95c7c410a3c27ff1b
font_01_sfnt_off0000e680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE680 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fe97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE97 10684 bytes
SHA-256: 877f29402f7a00930969a8383aa632e59d1a7632d99a2e9bc4dffaf3f3a33b79

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