Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e45981bfa766c86…

MALICIOUS

PDF

94.5 KB Created: 2021-09-02 01:55:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7481847e0505c30c5b1a4725f2556f68 SHA-1: 7b07fab4eec699cd0ade89d6347ff7c9f7284fbc SHA-256: 9e45981bfa766c8690cb44e5b34c779451608a52cadbc266c6d637b62ca77226
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised websites, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9866

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://crewmak.ru/uplcv?utm_term=word+powerpoint+and+excel+are+examples+of
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/tatujiwaribuliwibabux.pdf
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b4be6a275c2---10668843088.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4c6149d777---majov.pdf
    • https://batdongsandothanh.vn/luutru/files/kajizegatudebazujofuz.pdf
    • http://aapltd.net/userfiles/file/31966017289.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/a314c0777f1b9d18ab8a5d75caf29aea/71306150292.pdf
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612918924a8f8---sopunifikusuva.pdf
    • http://worldnaturalfood.com/image/upload/File/63767497293.pdf
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/2p7ll1i5fq23viiddm520t1n91/pakifevejanulesosuwi.pdf
    • http://sshs1962.info/clients/3/33/33dcd814b32da85629335a95ab3d0158/File/56803350262.pdf
    • http://www.catedralirodahaz.hu/data/editorfile/dukili.pdf
    • http://offerseir.com/basefile/offerseircom/files/fevojidam.pdf
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/d55056b5542a6d895848523da21eef9d/toleraxe.pdf
    • http://fullcolorspandoeken.nl/userfiles/file/85447667601.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607acef1bea48---57984599379.pdf
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/618d58c5697767179e1f93d00a74b6b3/95964996256.pdf
    • https://shibbirs.com/media/files/28181037473.pdf
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc27147931---17370570594.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607b80ee6efcf---fafaxek.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f66fab009f---kavixebinewufo.pdf
    • http://prestinoequitacion.com/imagenes/upload/files/nizifidogamesev.pdf
    • http://www.moyekolodin.com/files/ditifejazib.pdf
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2b3dc94886---gobupudajatesopu.pdf
    • http://civicwomen.com/ckfiles/files/8171031937.pdf
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/48c5832e53f17f4716b8f0eca1d8de2d/pusivifuvogijawiviz.pdf
    • http://fullcolorspandoeken.nl/userfiles/file/newonabuxakejubemoti.pdf
    • http://ei-windykacja.pl/upload/file/mobokizewep.pdf
    • 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_off00010c63.bin
03d765e29410963a4b812258b7cff0d9a0dc191e34174ec4cc4229b75cd5f5a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C63 17468 bytes
font_01_sfnt_off0001394b.bin
16885f3ab71449a6230cde39b55f1afd25134738fe0a17d5baa63dd7c9eb2fc1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1394B 10960 bytes
font_02_sfnt_off000152c1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x152C1 16792 bytes