Malicious PDF — malware analysis report

Static analysis result for SHA-256 179c17b97fdb40db…

MALICIOUS

PDF

73.7 KB Created: 2021-09-22 10:23:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a3578a5b8508499cc823399db8c2bb69 SHA-1: 1321934386c1f60810d69fceacb6a7b5a7e82c83 SHA-256: 179c17b97fdb40dbcdda6667621cebbe939ac1d444927dd58e3f81f6382081cb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic further support this, indicating the PDF acts as a lure to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 6

  • 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 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://garglob.ru/uplcv?utm_term=trevor+noah%27s+book+pdf PDF link annotation
    • https://museuminiaturesbesalu.com/files/33061578831.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/molidefipadefepe.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/bj71t9l5ke80vc30ifogqo1n1o/31150736083.pdfIn PDF document text
    • http://leylasuren.com/images/userfiles/imagefile/wudotinafusevidirasuzaxaz.pdfIn PDF document text
    • http://conelser.hu/fck_uploads/file/tubirujawona.pdfIn PDF document text
    • http://ahkkpcm.org/userfiles/39852784937.pdfIn PDF document text
    • http://rosesrealtyhomes.com/userfiles/files/lajosubemi.pdfIn PDF document text
    • http://vinhthuanvietnam.com/upload/files/20159352235.pdfIn PDF document text
    • https://www.peltonfell.org.uk/ckfinder/userfiles/files/473312605.pdfIn PDF document text
    • http://myphamasia.net/upload/files/femomixuxuzarofitodit.pdfIn PDF document text
    • http://sjhtractor.com/d/files/xawamuj.pdfIn PDF document text
    • https://podereilmontaleo.it/writable/public/userfiles/file/40005175714.pdfIn PDF document text
    • http://pensjonatagat.pl/userfiles/file/44288534260.pdfIn PDF document text
    • https://mehreganimaging.ir/images/upload/files/xafixizizorotaduwedix.pdfIn PDF document text
    • http://www.biharikft.hu/bihari-admin/ckfinder/userfiles/files/12326183802.pdfIn PDF document text
    • http://davidhammerstein.org/ckfinder/userfiles/files/30616453537.pdfIn PDF document text
    • https://baptistfriends.org/media/24273777023.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141ede056eb3---vekatifalenuvoxemakojav.pdfIn PDF document text
    • http://cherriestattoo.com/ckfinder/userfiles/files/faposud.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/161432ff4610d7---digodugejido.pdfIn PDF document text
    • http://ranjitabiswas.com/userfiles/files/zugamagipowusi.pdfIn PDF document text
    • https://debo-fit.be/userfiles/file///23019976097.pdfIn PDF document text
    • http://apsara.ru/userfiles/file/61819663053.pdfIn PDF document text
    • http://terralis.eu/catalogue_dynamique/file/41094648045.pdfIn PDF document text
    • http://t-eamplus.de/web/editor/files/85408778595.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/liluzopi.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_off0000be0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE0C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d61e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD61E 16604 bytes
SHA-256: a436eaf4781c1131e8f8faee42b2807a812b224105f5b0787ac46cde9bd3612e
font_02_sfnt_off000100c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C4 10652 bytes
SHA-256: 2fc7f67d8508e9c6704e80b8117c623a56603ca75405bc0eb146920155beca85

Open this report in the interactive analyzer, or submit your own file for analysis.