Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f01c2ca3a161241…

MALICIOUS

PDF

109.8 KB Created: 2021-08-21 14:10:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5a78f85965f05bce5b07d69952d9639a SHA-1: d9a7193c312553bea5f37a34a08cea59d03420ea SHA-256: 5f01c2ca3a1612411b699579978d0ab74126cbdbaee416208b13694157e14970
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous links to compromised CMS uploads and disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://zangerlelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/44143595065.pdf In PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608882c9ae914---jozetosapamoxavozozizos.pdfPDF link annotation
    • http://1000projects.ru/upload_picture/file/16341261917.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/bizigotisaj.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/9492a551e4467a585aec8baa696571c7/wipekanawapiluvexaxuke.pdfIn PDF document text
    • http://king-pro.com/userfiles/files/monopuked.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/57ad251531538a720f09a6120357684a/seliwotofip.pdfIn PDF document text
    • http://www.eurosecurimed.com/ckfinder/userfiles/files/juzobisizirogekiw.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160838aa606910---30234001247.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ab8d871c7---sopepupofonupototikuma.pdfIn PDF document text
    • http://identik.hu/editor_up/mebexulotuwabowige.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bd4d531447b---bisupawasibonelimepemisim.pdfIn PDF document text
    • https://motoquadro.de/userfiles/file/loxejo.pdfIn PDF document text
    • http://nikacarpet.com/My_Project/Hamishe_bahar/ahar_img/files/32685467304.pdfIn PDF document text
    • http://gramercygrand.ru/files/file/modadibesigesa.pdfIn PDF document text
    • http://firmen-bekleidung.at/userfiles/file/sovunaxoreranerex.pdfIn PDF document text
    • http://hotelgiottotorino.com/userfiles/files/19656911781.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16119b76f68bc2---vuvavamiboguludobusukeb.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/76bcbdab4c0691f359710227b7907329/wakiresefopiboxi.pdfIn PDF document text
    • http://china-hold.com/UploadFile/file/20210611085443992.pdfIn PDF document text
    • http://castudio.eu/userfiles/files/nesatanasikasireman.pdfIn PDF document text
    • https://ropaalmayoreo.com/images/userfiles/file/5284683671.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093d05ae6387---60851190951.pdfIn PDF document text
    • http://caydinhlang.net/userfiles/image/file/90201400894.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=jaypee+biochemistry+mcqs+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_off00014690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14690 17912 bytes
SHA-256: 399b175e1e7056b84fe4542ead186f4ea7927e06c366fbf3740d661f05aada9f
font_01_sfnt_off000175e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x175E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00018dfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18DFA 11124 bytes
SHA-256: 6346e838b91e10a741385804867a976f58d6a817264fca86662046b3dd1cdc8b