Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0474d19e2aff0ab…

MALICIOUS

PDF

80.2 KB Created: 2021-09-01 03:57:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: eca286d9d003ddaa6bfbb8ab8dd70b71 SHA-1: b579c5d870cb163084005b4845dcaf498e1793e8 SHA-256: d0474d19e2aff0ab4f33de4391d2037adf6f06401142b938e4d6c7af7fbd9dde
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution attempt. The heuristic PDF_RANDOM_URL_LINK specifically flags a link to 'doublehappyvstheinfinitesadness.com', indicating a malicious intent to redirect the user. The ML classifier and ClamAV detection further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://philabc.ru/uplcv?utm_term=find+the+fourth+proportion PDF link annotation
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd64332867---dovabe.pdfIn PDF document text
    • https://wfbulgaria.com/uploads/wysiwyg/files/96889314572.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611fcbc6591e6---1107546997.pdfIn PDF document text
    • http://vinhthuan.vn/upload/files/resizenimeratokupofu.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/t6torbrgj30lu8mkgmcbbmh1ts/67760483034.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/24756738620.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c90b2bed83b---xasuxonewowisevozutimu.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608212efd83a8---xenivepunesifofa.pdfIn PDF document text
    • https://laatjehuisweerstralen.nl/upload/file/93447743370.pdfIn PDF document text
    • http://happinessgown.com/upload/users/files/pokuwifog.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d35fc53e2---13616818147.pdfIn PDF document text
    • http://vangphutai.com/images/uploads/files/37935151128.pdfIn PDF document text
    • http://thangmayedex.com/webroot/img/files/77592439424.pdfIn PDF document text
    • https://marikakozmetika.hu/editor_up/waxagemofamupobesal.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/6lbjjj5s76e1ckmlip45ciqfo2/vakerelut.pdfIn PDF document text
    • http://thuephotocopytaihanoi.com/upload/files/lugowerupemeke.pdfIn PDF document text
    • https://cr2tek.com/userfiles/Proj_Name//files/sobojasogujowunivuzeb.pdfIn PDF document text
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/askj8qv32jhni9jvp5bnl8c3ea/pomodutirulifa.pdfIn PDF document text
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607870d28b4f9---gotinusinobulojo.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/qfq1gsu331471a65p0mimu6ak3/kabasejiwa.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/brmhjvbth97iepbfd2ednsq9ht/56553961033.pdfIn PDF document text
    • http://wefocusdesign.com/upload/files/dekikezamug.pdfIn PDF document text
    • http://nutranghongngoc.com/media/ftp/file/widonevusamojuvobajeli.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/41236181234.pdfIn PDF document text
    • 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_off0000d17c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD17C 10296 bytes
SHA-256: 8f8254bb0a157599b08a4823d4dccc98efcade32d8b5726894b59860fff95f49
font_01_sfnt_off0000e87b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87B 18716 bytes
SHA-256: 6593a614b9b6a1f93ffe4fe30fbd36eca3ace729340b27d478706d769d224241
font_02_sfnt_off000119e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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