Malicious PDF — malware analysis report

Static analysis result for SHA-256 996f6386e6249ca2…

MALICIOUS

PDF

83.0 KB Created: 2021-09-23 06:25:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 740d8f5982e0478a52d5d4233496983b SHA-1: 64355f9a35485996effccb5cfce3204ac37ab9c3 SHA-256: 996f6386e6249ca2fff9dc09ee648509e18e3f01195b6490150fb038e2f89ddd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document impersonates a cloud file-sharing service, a common lure for phishing attacks. It contains embedded JavaScript, which is often used to download and execute further malicious payloads or redirect users to malicious sites. The document also contains a large number of external links, many of which point to disposable domains, suggesting a link farm or redirection infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://denizlihorozu.com/resimler/files/guwaverex.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/161444030ddcfa---vupoji.pdf
    • http://iknow.pl/files/file/41345402065.pdf
    • http://dichvugiayphep.net/hinhanh_fckeditor/file/febativen.pdf
    • https://aznamaste.com/ckfinder/userfiles/files/gelabetowozoperowuwelu.pdf
    • http://dentalclinicbangalore.com/uploads/10977220889.pdf
    • http://ettorebelfioreliutaio.it/userfiles/files/nujeduziligizotelu.pdf
    • http://www.asap-recruitment.net/upload/file/voforexifuwoponoxo.pdf
    • http://letsbelegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/13497421976.pdf
    • http://hicoweld.com/shop/fck_file/file/64760674529.pdf
    • https://tndvn.com/js/ckfinder/userfiles/files/sizorujiguto.pdf
    • http://akkoryazilim.com/userfiles/file/vowolirisikezukexoxel.pdf
    • http://vwtint.com/userData/board/file/65883523450.pdf
    • https://marwaautorepair.com/nbloom/fckuploads/file/39192947068.pdf
    • http://poetische-malerei.de/web/editor/files/96895612569.pdf
    • http://aliceinformaticasrl.com/user/pages/lizezofefinotokakezo.pdf
    • http://le-nora.com/userfiles/file/dekudozaxudotupun.pdf
    • http://topimmigrationlawyer.org/ckfinder/userfiles/files/8240745497.pdf
    • https://chinatupai.com/web/js/ckfinder/userfiles/files/35719171425.pdf
    • https://jin-hung.com/userfiles/file/98833619756.pdf
    • http://dymenahealthcare.com/upload/fckeditor/file/833541230.pdf
    • http://fuyu.010bi.com/ckfinder/userfiles/files/tinepesizezan.pdf
    • http://ambvet-trefontane.eu/userfiles/files/vadowu.pdf
    • http://bulmarconsult.com/files/tebosuwelaruterelos.pdf
    • http://cnwt.mgo.cool/upfile/files/2021/09/18/femozafiwanak.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=free+up+storage+android
    • 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_off0000e168.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE168 16792 bytes
font_01_sfnt_off0000f97a.bin
07523423d1f33740eb8b83d919187613589ca7df0f254ae1f8f1c3728c01c5f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF97A 17512 bytes
font_02_sfnt_off000126cc.bin
bce766b471b4640bf6bb4945a869c077a663f3909f40c7c055c537c08d7eb49c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x126CC 10596 bytes

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