Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e3f21efa4db8d3a…

MALICIOUS

PDF

80.5 KB Created: 2021-09-04 18:13:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: be32aaef66732ab2618544b8239fb0f7 SHA-1: c069df269c3e6300f535a6857bb75eaabc0dcc52 SHA-256: 9e3f21efa4db8d3a14161b62143c84310c3be76ed7f8d6a2a725e28df65f3079
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and other domains, suggesting it functions as a link farm to distribute malicious content or harvest credentials. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://wastran.ru/uplcv?utm_term=bengali+calendar+2019+pdf PDF link annotation
    • https://ruxthai.com/ckfinder/userfiles/files/7033860301.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f67e9d8c21---vedafajokuzegojinetawa.pdfIn PDF document text
    • https://dm288.com/slicice/file/zetofesituxamex.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082274d9a451---tinetadunakagexu.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/userfiles/file/57457616968.pdfIn PDF document text
    • http://donauwell.at/userfiles/file/36264767323.pdfIn PDF document text
    • http://berrybucs1973.com/clients/3/3a/3a2d6910be1067feaf6dc79f90d505e0/File/tonoturarowoma.pdfIn PDF document text
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/5k5qrudpimtt2vheqs4go4ng68/57821414356.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/dd0ef0cb70af2b025dc6e954a53771f1/91320410964.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071ee85beee7---zejevovakifudi.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/69714500718.pdfIn PDF document text
    • http://jun-travel.com/userfiles/file/42602866139.pdfIn PDF document text
    • https://mecaniquekd.ca/upload/file/lezukasutitejewisof.pdfIn PDF document text
    • http://cserepakciok.hu/xdata/file/mobabuvafugoxon.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a1987199863---13177954977.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/6ab61e035d3e98908622871374b2746d/91539552841.pdfIn PDF document text
    • https://alquimia.in/admin/fckeditor/editorfile/40772630803.pdfIn PDF document text
    • http://tilestone-pools.com/i/File/13153455767.pdfIn PDF document text
    • http://elfuklid.cz/foto/Image/file/beguniwegesuwitigagirexig.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/54140890709.pdfIn PDF document text
    • https://www.marjojaspers.nl/ckfinder/userfiles/files/wagonimigumi.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9193876b0a---50270582805.pdfIn PDF document text
    • http://n-production.com/upload/fckeditor/file/sosonekukojav.pdfIn PDF document text
    • https://pelletier-tp.fr/ckfinder/userfiles/files/65020794277.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_off0000d588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD588 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9A 17592 bytes
SHA-256: 71c61adab1d434e2714d52f4bde642b6a9b37b37a0b6fad21ac83c43bf1def9e
font_02_sfnt_off00011b28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B28 10924 bytes
SHA-256: 914fdf9d99896cb99f7881e29d9cb0bd13d51c32b9384ab5ec1447007830092b

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