Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5961b7970917962…

MALICIOUS

PDF

74.0 KB Created: 2021-09-17 10:10:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0e547054671ea8f1bbf6edc08123ac74 SHA-1: 1ea3436032e02c5f65a5ba2c42209a4546e78c5e SHA-256: f5961b7970917962d858efbebb30ec15ecbe3fee84e6c1eb59aaa03202e4d04e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristics point towards it being a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://abcoegypt.com/userfiles/files/lovedowodolimatirupojora.pdf In PDF document text
    • http://labonscafe.com/userfiles/feguwujujupilakax.pdfIn PDF document text
    • http://qlionshousing.ca/userfiles/file/lomilek.pdfIn PDF document text
    • http://fongyoskert.hu/userfiles/files/ditoritotej.pdfIn PDF document text
    • https://tssch.in/tssch/application/admin/uploads/file/warisogagalidunozabow.pdfIn PDF document text
    • http://hzosm.com/images/upload/File/49227688100.pdfIn PDF document text
    • https://shiksha24.com/userfiles/files/tiremunufasudapi.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/forabemurikupoxo.pdfIn PDF document text
    • https://zakarpattya-tour.com/upload/golevaxofefin.pdfIn PDF document text
    • https://lotteppta.net/beta/assets/file/zonapidosegowowinejakur.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/kamafumixodona.pdfIn PDF document text
    • http://yuhao-tech.com/userfiles/file/zedilomapulobolexubawop.pdfIn PDF document text
    • http://carrasvilla.es/uploads/files/fiwofugabu.pdfIn PDF document text
    • https://bahia-group.com/ckfinder/userfiles/files/21085938498.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/97488373401.pdfIn PDF document text
    • http://straps.by/ckfinder/userfiles/files/36251957576.pdfIn PDF document text
    • http://jfhcoaching.nl/userfiles/files/mudekekazekoxeka.pdfIn PDF document text
    • http://danangsculpture.com/uploads/image/files/xufekigogunoramoberojam.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1614020b2af50f---wedogazizejimejuta.pdfIn PDF document text
    • https://santa.sg/images/users/00000000/files/68203644801.pdfIn PDF document text
    • http://whuntex.ru/userfiles/file/31898312291.pdfIn PDF document text
    • http://domki-kopalino.pl/pliki/9467440579.pdfIn PDF document text
    • http://gfzgt.ch/upload/file/defalogumovo.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/70d6a2ea7ceb2f4734527cb13edfea64/wamulozojowusosuxe.pdfIn PDF document text
    • https://aashianarealty.com/file/76455385486.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=kindergarten+sat+practice+test+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_off0000bd45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD45 17260 bytes
SHA-256: 92981876519bebca8740554ca0da5f2de752a7f82a11f81f240fe5795db51395
font_01_sfnt_off0000e9c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000101d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D7 10620 bytes
SHA-256: 20aa7b235400061fe5358ad1483d495db7e606d837c10f4730dc6af589bc66b9

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