Malicious PDF — malware analysis report

Static analysis result for SHA-256 01a009601006c2ea…

MALICIOUS

PDF

98.4 KB Created: 2021-08-13 00:59:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8262b87792b74905dbd2003ce6d0e5e4 SHA-1: 280c4d364859791aac0203121958c865a3423651 SHA-256: 01a009601006c2ea3b7176b114a99d1393d253c488423fd2f8b47a9a4c3ea5f2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories, suggesting a phishing or redirection scheme. The presence of external URI heuristics further supports the attack pattern of directing users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160c0ebc71a2d8---tomunujujafalid.pdf In PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6e894e7a03---30950937259.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/67857552348.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/4944011253.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/ea0cvijef80dhljda0ftngvjn1/44043216891.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/xaleluwemomugowajet.pdfIn PDF document text
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/8726c7a74ed6080d9663e97726e4fc2b/34432647804.pdfIn PDF document text
    • http://danguykhoidoanhnghiephp.vn/Upload/files/vozatuse.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1611425cadee23---39515990030.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609998e94cea9---wipekisuz.pdfIn PDF document text
    • https://cremyco.com/app/webroot/docs/file/jijazomoluko.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2cc9b88d4---94500075803.pdfIn PDF document text
    • http://pcmcpropertyblog.com/wp-content/plugins/super-forms/uploads/php/files/725bd03dc77bd16c73bd9b006db5360b/bedijekenezoloxujagabe.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/16858343525.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b36cde3552---13664863151.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b353228158---64325929904.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ee1bdeecb31---85967892899.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160baafef4161c---bagekatelotuvofoxe.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/p7dgbvp99p8j2km0jaahvl33m6/20319839282.pdfIn PDF document text
    • https://tonymusic.se/UserFiles/files/21363039157.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/70c1793d7c893e762a33f11d4a49b626/dukadojinex.pdfIn PDF document text
    • http://kennedy-jackson.com/clients/f/f7/f78508644b517540cdb1549d93860f53/File/60312674927.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/63094220504.pdfIn PDF document text
    • http://guerrazzi.info/userfiles/files/sufuwume.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2cd83d901---gubirilexosinoxexis.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821d984f89f---pavagavuwuzexudoporuxozom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=squat+form+with+weightsPDF 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_off00011da8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA8 16984 bytes
SHA-256: 5c9ac2d41ab5fea26d54dcf7117462f030eddd12ba113e680fd27803f8c8d830
font_01_sfnt_off00014a08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A08 10916 bytes
SHA-256: 803ae4aba5ac36d7b5724f3456da269156648136508b9600b83eb2d4c8970ce6
font_02_sfnt_off00016323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16323 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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