Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e4e20d069b8eb35…

MALICIOUS

PDF

76.6 KB Created: 2021-06-28 21:45:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 655c4c738c2940d679c7ad398e4d9365 SHA-1: b9afbc146e192debc4ab6b30582d00a1748d7c52 SHA-256: 7e4e20d069b8eb35e5bb77c6a560efefa492c1d10ecc64f0b80cf90c00a75d82
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, directing users to multiple compromised websites hosted on disposable domains. The primary purpose appears to be phishing or distributing further malware through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/365j8ectecdbseg2g1eu69nuqn/57282680649.pdf In PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/172a008b103fee158c963e62b19dd7f4/valinaxilido.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/nt59lt03rskhbph8u9ht3sjc6p/texugamunakonuzono.pdfIn PDF document text
    • https://intrigantka.ru/images/userfiles/file/mapapemesugipoji.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/9ehg1v0lm4qdhu6msb4n939f77/58458392694.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc32009fc2---38223479871.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a83b7b05c32---52876106598.pdfIn PDF document text
    • https://cortopolis.ar/userfiles/file/2524640403.pdfIn PDF document text
    • http://mobydick-band.de/fckdata/file/muriturexuj.pdfIn PDF document text
    • http://china-zzld.com/uploadfile/file///2021052718074667.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a97ae0f2b92---najujobopotogiwap.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/892e659afb7e1db6fe48512d2070f12f/48773053558.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b6eb4d4a947---sejebimate.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/2k57ue4g4ltcq17ju0lndttb16/70271680570.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/reterugunadodajifalujofag.pdfIn PDF document text
    • https://orldoc.ch/wp-content/plugins/super-forms/uploads/php/files/3uv3oiss46g5c5hv0sbgii8rl5/76269672810.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0be4bc9c8---jipewogib.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160772dff51a51---kapasute.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///nuforezepokezovibajopim.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf97135cfb1---66165137449.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/r1cg3jlb23d435669mf31ipdf4/20143177141.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+find+a+pdf+filePDF 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_off0000caee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAEE 16516 bytes
SHA-256: 26bed6fb147d4ef704efebc7942fc05d14f889796bc612b667a32fcf58703b14
font_01_sfnt_off0000f5fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010e14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E14 10300 bytes
SHA-256: f7a40708e137d4a90b3ff743bd457073b814deabda420615b32d4f3bcb901dd9

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