Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ac614e478226b7c…

MALICIOUS

PDF

92.5 KB Created: 2021-09-03 13:10:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b914e5276c1b2a83f333b7343ee09664 SHA-1: b697ae118e7565cbe75d34d4d53495d20e20dd5d SHA-256: 9ac614e478226b7cf04ca5422387d8ba548784604edf884c37101ac87a452e42
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to potentially compromised websites, suggesting a phishing or malware distribution scheme. The presence of external URI heuristics and link farm patterns further supports this assessment, indicating the document's primary purpose is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://karapinarinsaat.net/userfiles/upload/file/bewivapazaramonekud.pdf In PDF document text
    • https://akapacha.com/userfiles/file/rosomububixe.pdfIn PDF document text
    • http://www.77ice.com/upload/files/jimirolejozigozuzujuje.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160712f858709e---janowimutuforopo.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/c5d8677f8cfa61ba7403bc514f2b9bd5/wazuvopomipanik.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/318775112ce94ffd0418b19d8563e18e/pefakewirateriduwuwojo.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a58559f2841---baluzuforiroser.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/hcmlbmttnguka4haffurtgjila/vokukimiwokoku.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081329605337---walodejefuzerad.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/239b0fe2f842b964cad8d27324791502/mupajifalagala.pdfIn PDF document text
    • https://bettyloupaints.com/userfiles/files/nidos.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/vewugiboguroxixow.pdfIn PDF document text
    • https://office-agglo-larochelle.fr/userfiles/file/93425434796.pdfIn PDF document text
    • http://kahsport.cz/userfiles/file/74488041011.pdfIn PDF document text
    • http://smartcevent.com/clients/871459/File/moxobulokakimodonup.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160864fd9c8c84---29762333795.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/rasojezinotawul.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/gkj31b1j4onmugnbn37i4slvvf/35039564693.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/74373106474.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a77115149f---65383254682.pdfIn PDF document text
    • http://ginzaoakland.com/uploads/files/16641832887.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160949eb72c2eb---17640806630.pdfIn PDF document text
    • https://hunde-katzen.at/soubory/54307589190.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bacf59c5399---79225117484.pdfIn PDF document text
    • https://malashealthcare.com/userfiles/files/bobepino.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=uganda+public+health+act+2000+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_off0001047d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1047D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011c94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C94 11000 bytes
SHA-256: 882a424d2087ec8e455048183b834d5bb10be249b71bc88092d4751b1c1a60b7
font_02_sfnt_off000135a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135A0 17748 bytes
SHA-256: 525351c3cb0e7b1c1ef7b92bc298532a10408baac544b9da12cafc00c1a1efda

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