Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa6dbedd2d984057…

MALICIOUS

PDF

118.9 KB Created: 2021-09-23 07:32:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 580e6d81b020f27106b8287211a16568 SHA-1: 6b4d76679cdfdfb64c608bab59ffbbe3f77efa90 SHA-256: aa6dbedd2d98405738bee179661f750318d9108aa1c36688bd4970d23769cc89
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous embedded URLs pointing to external PDF files hosted on various domains, suggesting a link farm or redirection mechanism. The 'SE_QR_LURE' heuristic indicates the document may instruct users to scan a QR code, a common tactic in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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 http://skisun.it/userfiles/files/nameju.pdf
    • http://bogaarchitetti.it/userfiles/files/54290336780.pdf
    • http://chayka-svg.ru/files/suxobugerufoduwiba.pdf
    • https://kolkataangikar.org/ckfinder/userfiles/files/miwatiromojudifanedonerip.pdf
    • http://orzo.cz/uploaded/files/46523240488.pdf
    • http://stjconsulting.it/userfiles/files/pimikugelol.pdf
    • http://americasbestmanassas.com/uploads/files/7200677851.pdf
    • http://theeultimatenetworker.com/ckfinder/userfiles/files/rolemajafepixirezeno.pdf
    • https://www.mtiwelding.co.uk/admin/ckfinder/userfiles/files/bewufemadobuwoxuxolun.pdf
    • https://milsagliksen.org/upload/ckfinder/files/viwekodatorizepifil.pdf
    • https://rosebankprimary.co.za/inc/ckfinder/userfiles/files/tozenanazi.pdf
    • http://minerva-collection.net/files/files/pafibomeparizesamiwojomiv.pdf
    • http://baugeraeteverleih.de/benutzerdateien/28079411597.pdf
    • https://ventadeterrenosurbanos.com/userfiles/file/lumubexafamijepokomapu.pdf
    • https://bizimpin.com/calisma2/files/uploads/vasiwajodojuvok.pdf
    • http://lejonhund.com/upload/gidevufujuzusotofaroko.pdf
    • http://miyisz.com/mingyi/images/userfiles/file/xegoxivap.pdf
    • https://tainandentist.com/uploads/files/202109020012353378.pdf
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143ce3ea4fe6---39309887529.pdf
    • https://htchninc.com/d/files/benabarap.pdf
    • http://webcertain.ca/contentupload/fckeditorUploads/organization_/file/38737138488.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/161477846bcbf6---vamul.pdf
    • https://kitapkapla.com/upload/ckfinder/files/69504855562.pdf
    • https://envirotechindia.net/admin/userfiles/file/sifikes.pdf
    • https://ourguarantees.com/userfiles/file/solawasero.pdf
    • http://lakesnwoodskerala.com/uploads/file/sefaxiwivaxegexosaron.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=alight+motion+qr+code+scanner
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015a64.bin
d44e6eff6e1c35637fda5da46acf30891b521fcfad52a5c7640f782334ba8d59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15A64 10944 bytes
font_01_sfnt_off00017306.bin
d7426cb2fe44d5957c3af8fa6ae87c77d7b3ce24e2183db6b215e57c57770fc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17306 25944 bytes
font_02_sfnt_off0001b591.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B591 16792 bytes

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