Malicious PDF — malware analysis report

Static analysis result for SHA-256 0675016ce9172607…

MALICIOUS

PDF

77.0 KB Created: 2021-09-17 06:56:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d85eb331077ad3e08a771f3166f6cf2b SHA-1: 8c466016805580287b9ec91c1bc5303372b1eb2d SHA-256: 0675016ce9172607e5d622e1ceec81084f8f5ffadb1fa6b3f0cd991cb3995620
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to domains that appear to be part of a link farm, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates a malicious intent to redirect users through multiple domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://huntic.ru/uplcv?utm_term=apkland+tamil+live+tv+app+download PDF link annotation
    • https://bostaninsaat.com/image/files/dabiluzazoribetatexaraw.pdfIn PDF document text
    • http://cathyknightwaite.com/ckfinder/userfiles/files/wetosozetopidusugexozeted.pdfIn PDF document text
    • http://giovanninociti.com/userfiles/files/3947097417.pdfIn PDF document text
    • http://weilandvloeren.nl/fckimages/ledukositujenevil.pdfIn PDF document text
    • http://yusungchart.com/userData/board/file/11623214459.pdfIn PDF document text
    • https://suativisamsungtaihanoi.net/upload/files/28973214986.pdfIn PDF document text
    • http://www.hz-kontejnery.cz/ckfinder/userfiles/files/75846669873.pdfIn PDF document text
    • http://marinaxaraes.com.br/ckfinder/userfiles/files/mebujofiwilarefenegone.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1779648c8fbcefb2e3829a47bc39762f/nolisevudugexes.pdfIn PDF document text
    • http://domki-kopalino.pl/pliki/rofuvetafopewa.pdfIn PDF document text
    • https://quizai.com/uploads/files/vakuguwim.pdfIn PDF document text
    • http://xmzhj.com/UserFiles/file/5280008513.pdfIn PDF document text
    • https://eghamatyab.com/basefile/bainbookcom/files/bukajevififejototami.pdfIn PDF document text
    • https://autoroman-service.ro/imagini_ws/79774222312.pdfIn PDF document text
    • http://gabortech.com/admin/file/40484515948.pdfIn PDF document text
    • http://yogo110.com/userfiles/file/ziloxotuguxopevutobi.pdfIn PDF document text
    • https://www.q-jin.ne.jp/ckfinder/userfiles/files/43959264184.pdfIn PDF document text
    • http://tnslib.tools/userfiles/files/51007406006.pdfIn PDF document text
    • http://agrocare.hu/ckfinder/userfiles/files/23259276983.pdfIn PDF document text
    • http://tjsyjdq.com/v15/Upload/file/202193216525409.pdfIn PDF document text
    • http://www.dkmodels.net/ckfinder/userfiles/files/28518494593.pdfIn PDF document text
    • http://streathamtaxi.com/survey/userfiles/files/lefuditit.pdfIn PDF document text
    • https://mobilaide.com/upload/editor/file/fejobijikupabulugif.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_off0000c8cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e0de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DE 17544 bytes
SHA-256: 591dc2f245c7a0b8e67c5710c4062b6c02c9fe872a5d8140e775c3310832a4c3
font_02_sfnt_off00010e4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4A 10512 bytes
SHA-256: 690b2e1f5011150ffc2a209e4e370fe7924d7aee231930048f92546793ad9017

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