Malicious PDF — malware analysis report

Static analysis result for SHA-256 47d058e0c770fdc9…

MALICIOUS

PDF

86.8 KB Created: 2021-08-01 06:36:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 739b4ba660379a64be4515a668eb82fb SHA-1: 02ede6f54ef227dc3a492f6a234bf263c490f7d5 SHA-256: 47d058e0c770fdc912d85326ae09a75ad88e4d6004f8bc42538b7bcf1f57ab55
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous links to external websites, many of which are hosted on compromised WordPress installations, suggesting a link farm or phishing lure. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the nature of the links and the detection suggest the PDF is designed to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086b9d039283---18852804670.pdf In PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160949c391f620---tugag.pdfIn PDF document text
    • https://www.kcequipment.com.au/wp-content/plugins/super-forms/uploads/php/files/11d6d74ecdcf95bd7f84d71c9308b80f/rovetiduwabi.pdfIn PDF document text
    • http://womensmentalhealthmd.com/clients/9/9a/9a9ccad1be43d50cbc9928f06550b956/File/59015704525.pdfIn PDF document text
    • http://schooldistrictservices.com/clients/f/f6/f6ab1571d2cdf5e569af7b76e288b17c/File/zipob.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/rnarvhcvsmk6n5ko6li8rj8284/ragafaxubifuguli.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160878ea65cb3d---32575115762.pdfIn PDF document text
    • http://rrbrentacars.com/files/others/nodojadeb.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1607187ed1c48c---keveg.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b660b0c9de0---56753252433.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/70380269622.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160796bfd6b42c---teramidomu.pdfIn PDF document text
    • http://homenet-spb.ru/userfiles/file/49491112698.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16071b5e3e9e30---78713931534.pdfIn PDF document text
    • https://ewastexperts.com/userfiles/files/redaravejifenerejul.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/fagurivuwasomosenej.pdfIn PDF document text
    • http://henskeschildersbedrijf.nl/upload/44798515607.pdfIn PDF document text
    • http://jirehenl.com/userfiles/file/022121394052.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e1d51ed0a8---xoletejirusunawuz.pdfIn PDF document text
    • http://hotelamadeustorino.com/userfiles/files/35312988539.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfef5f7d457---weteve.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-5/file/duminurapagozojonetu.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160859c765aa51---96944166052.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=turbotax+free+file+2021PDF 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_off0000eecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECB 17188 bytes
SHA-256: aaddc365e63478737529bb66b5bda40b90354dd3a798daab9dc32076258e58bc
font_01_sfnt_off00011bc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000133d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133D8 10532 bytes
SHA-256: d0e9d36f70a0454d37c3d4d25f6decb387ff7805d398132e384a1c181b50b778

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