Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd3ed5228cf6df81…

MALICIOUS

PDF

69.8 KB Created: 2021-09-28 22:03:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: dc4a47198416cd46b92d95432d2369d3 SHA-1: 0445a153209d0e040b8c041b53120a6a476b56f3 SHA-256: fd3ed5228cf6df8127657317147d15a6a17949b8e89641ef1c4cd9ad6af51e8c
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The presence of numerous external URIs, including a link farm on disposable hosting, strongly suggests a phishing or malware distribution campaign. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://garglob.ru/uplcv?utm_term=stopping+amber+alerts+on+android PDF link annotation
    • http://bdsps.org/slbdavbatala/userfiles/file/kuxaniwi.pdfIn PDF document text
    • https://koratspring.com/upload/file/sipuverufufub.pdfIn PDF document text
    • http://bhartiyambeohari.in/userfiles/file/kedekozifasadavawu.pdfIn PDF document text
    • https://marblobathware.ph/app/webroot/img/files/rajafajesubixobinetiv.pdfIn PDF document text
    • https://nadrozmerne-sklo.cz/uploads/pexojivuxukoxofijigabov.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/vaxewe.pdfIn PDF document text
    • https://eletmodguru.hu/files/files/suvenowubapiledezufun.pdfIn PDF document text
    • https://alebusph.centralcms.cloud/galeria/files/59246586062.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/18792708805.pdfIn PDF document text
    • http://redemaisfarma.com/userfiles/file/97697027940.pdfIn PDF document text
    • http://sushi-belovo.ru/files/dolofut.pdfIn PDF document text
    • http://quetthe.com/upload/files/fiviragafarenu.pdfIn PDF document text
    • https://hankilfood.com/upfile/files/sidafewodufa.pdfIn PDF document text
    • http://matchonusa.com/uploads/files/54455598807.pdfIn PDF document text
    • https://andrejc.si/files/file/netuvudusaxuluv.pdfIn PDF document text
    • http://alpinist.store/sribati/editor/uploadfiles/57970153477.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/8c8234053257d1205b9707400530d302/93479540023.pdfIn PDF document text
    • http://nagakuratrading.com/js/upload/files/pigizogovufefufomulemag.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/99027439507.pdfIn PDF document text
    • http://yoga-privates.com/yoga-privates/file/21629458862.pdfIn PDF document text
    • http://www.polni.si/Images/files/65713600660.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613557021f841---muvepiwopamifarew.pdfIn PDF document text
    • https://gancza-yacht.pl/userfiles/file/30456991715.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_off0000b061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB061 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC873 15728 bytes
SHA-256: 43eedb80ccdf17605450782754c2001aa33a98c5ea4f20322ea79b015f139fd6
font_02_sfnt_off0000f07c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07C 10948 bytes
SHA-256: 5f251aac04fb56707d1c9292e8cfdf598efe5abbc306b71ad11a6eb40f72cf62

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