Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eb0489330ac2662…

MALICIOUS

PDF

71.0 KB Created: 2021-09-26 22:55:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3948bb2e837da54c510f906d55ede9d2 SHA-1: f485c78f0eed6225d1ff69630160d550088e9980 SHA-256: 9eb0489330ac26627c0f5dfc0b0c21e78ca3d58251ba9409d11c0e69e239821c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. It contains numerous embedded URLs that point to external sites, suggesting a phishing or malware distribution attempt. The presence of multiple disposable hosts and UTM parameters in URLs further supports a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://wastran.ru/uplcv?utm_term=fnaf+ultimate+custom+night+apk+download+android PDF link annotation
    • http://vansuloi.com/uploads/userfiles/file/vugixiles.pdfIn PDF document text
    • http://kmjmt.com/news/upload/file/21091014305582089656pave.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/ledujatiwopivimanivarosar.pdfIn PDF document text
    • http://blccy.com/userfiles/files/woxazefira.pdfIn PDF document text
    • http://songhandiban.com/uploadfile/file/2021091216474673499.pdfIn PDF document text
    • https://tadimtursu.com/image/files/66776800049.pdfIn PDF document text
    • http://4seasonstours.in/userfiles/file/25126456272.pdfIn PDF document text
    • http://pyhunlian.com/uploadfile/file/79862552325.pdfIn PDF document text
    • http://vanprodukt.cz/UserFiles/File/56637181852.pdfIn PDF document text
    • http://marienoellebermond.com/img/uploaded/file/tokifonulowaluxufe.pdfIn PDF document text
    • http://kayapalinakliyat.com/file/35856350042.pdfIn PDF document text
    • http://gr-chem.com/upload/files/sopet.pdfIn PDF document text
    • http://banlinhkienlaptop.com/userfiles/file/mazufigurozakesowov.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1614181b7a1ca8---pufijubixisoxodif.pdfIn PDF document text
    • https://mattress-leader.com/media/47137725180.pdfIn PDF document text
    • https://hippodrome-compiegne.fr/www/uploads/file/tokogutubiwivodelo.pdfIn PDF document text
    • http://papianiarch.it/userfiles/files/18755817675.pdfIn PDF document text
    • http://cmtl.in/uploads/userfiles/file/file/14910123244.pdfIn PDF document text
    • http://christmaslandint.com/userfiles/94704072745.pdfIn PDF document text
    • http://tms-technology.com/ckfinder/userfiles/files/leviwajudozur.pdfIn PDF document text
    • http://morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614706a94afec---tepinonoxulofugoxupakij.pdfIn PDF document text
    • http://www.rannatennis.ee/data/upfiles/files/vijikizexukidavezukuzad.pdfIn PDF document text
    • https://natatourism.com/userfiles/files/zigerugimavofalafapo.pdfIn PDF document text
    • http://joesservicecenternj.com/userfiles/files/50597248639.pdfIn PDF document text
    • http://eastwoodfamily.net/userimages/sipobek.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_off0000b381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB381 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB93 15140 bytes
SHA-256: aa58ba3bf1c227d8208adb0526beef04ef4fe1670843df4e79dcee47abde209a
font_02_sfnt_off0000f196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF196 11324 bytes
SHA-256: d36308f8d801bf815f78387ca2111ba8c553118c704ca7ee257c04b412227cc3

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