Malicious PDF — malware analysis report

Static analysis result for SHA-256 747d62ed83af1016…

MALICIOUS

PDF

82.7 KB Created: 2021-09-05 08:55:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 81f4332397bf9cc33ae4f7a7bdd23d67 SHA-1: 520d2f32f13952eb72caeeb62e298c1a1b3d570d SHA-256: 747d62ed83af101626491b14e3d89308f6237e29f695e800b49e87ec696cb2fb
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing lure. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to evade gateway security. While no scripts were directly extracted, the presence of numerous embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, suggests an attempt to redirect the user to malicious content or download further stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://innotec-industrie.be/userfiles/file/wokozevikowup.pdf In PDF document text
    • http://allasclub.com/campannas/file/gadidepusasaputigexibonip.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608d51aaac429---vivuradarijarodun.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16093d508cc59e---zotaxuxekotuvi.pdfIn PDF document text
    • https://hansenlight.com/UploadFile/files/tuzevupoxuzalusadezagol.pdfIn PDF document text
    • https://samsungdvmklima.com/upload/ckfinder/files/22422978894.pdfIn PDF document text
    • https://aneri12.cz/res/file/sexutiju.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f863ad5710---zenopa.pdfIn PDF document text
    • http://fittbike.hu/files/file/tiritipareg.pdfIn PDF document text
    • http://quinta.cl/upload/files/55411112230.pdfIn PDF document text
    • http://delannahotel.com/user_img/file/begubotuvikumavogodafow.pdfIn PDF document text
    • https://nguyenthelong.net/userfiles/files/77478999444.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/3957740d9a66b1a456a3770c3f1624f2/pibufozukifimunimop.pdfIn PDF document text
    • http://tasteofruraleurope.eu/upload/File/11801564889.pdfIn PDF document text
    • http://deurenhanger.nl/userfiles/file/gititezorikaxomo.pdfIn PDF document text
    • http://tindangnhadat.vn/upload/files/kubiwowivuzivev.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecae1c18a8---36278958238.pdfIn PDF document text
    • https://gs-hemeringen.de/ablage/userfiles/files/pafisofusezejupiwikar.pdfIn PDF document text
    • https://marblo.ph/app/webroot/img/files/sevonisasafilagix.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606efb0ac9eda---nubeminunokuzukiwaka.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/64441478c292c1726cbb89b75f7dc8ba/78429919002.pdfIn PDF document text
    • https://murten-hotel.ch/userfiles/files/40784880019.pdfIn PDF document text
    • http://sial.pl/galeria/file/85171953182.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=qpdf+remove+password+windowsPDF 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_off0000dff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF808 17096 bytes
SHA-256: aa721fd79ce769807151d300df7bc83989ce09f22dc69d5fa4cde51650965ffe
font_02_sfnt_off0001247e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1247E 10728 bytes
SHA-256: 7b9fc170f464ec5f2590e4fe5406e03005b7bc17ff57da12928637ba54b8995a

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