Malicious PDF — malware analysis report

Static analysis result for SHA-256 9776b6a2f7a6e412…

MALICIOUS

PDF

88.4 KB Created: 2021-07-03 04:05:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 3fe22f26c0b241e5d52f9571f229200c SHA-1: d96a85ce472d895266e2ad8c99c6301b92a1152d SHA-256: 9776b6a2f7a6e4120f540e6fb116c18340d114799bf0f820c64290ebd6f4b1ce
216 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it's a lure for malicious content, including a QR code redirect and instructions for a password-protected archive. The embedded URLs and link farms suggest an attempt to direct users to malicious sites or download further malware. ClamAV detection and ML classification strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • 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 https://smidgel.ru/uplcv?utm_term=fortnite+android+pc PDF link annotation
    • http://tamilannuaire.com/var/www/vhosts/vps296430.ovh.net/tamilannuaire.com/images/file/kakerudaliketir.pdfIn PDF document text
    • http://ibb-online.ru/f/file/3113312069.pdfIn PDF document text
    • http://fatamorgana.fr/uploads/assets/file/taguveju.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160765caf44cb1---jevelanazizuxop.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/nrrbpuvmics5p3gacnrf16eb40/nojimodorikomuterexokibiw.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecfb0e1e47---42852447917.pdfIn PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/o8uod1j46b9ev6pfkijlu8i562/dobavuserafesoxinizev.pdfIn PDF document text
    • http://boek.se/bilder_umeny/File/sebanamosorujafadejane.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/da75e1068c1ffe24a046751f3a6facb5/kawapoxagetaz.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/f84049735b582071a001c420407b695a/vitiguletumu.pdfIn PDF document text
    • http://urjabatteries.in/userfiles/file/98022972192.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/d0d5f3a6fc97009daf6f9d286e79ff00/tokijipinazabaxemagaxi.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/29g975llo2ulobf5pifrqui2cs/pinorawapovafunas.pdfIn PDF document text
    • http://irk-yoga.ru/upload/files/43810341584.pdfIn PDF document text
    • https://aonetreks.com/uploads/file/kujasovopifugirivirivinu.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608587a5382fe---fazokokamujonivutaforuja.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/f2120e038223a50344952cefa9b790b3/13432345985.pdfIn PDF document text
    • http://ghalemdi.com/userfiles/file/diwuforewi.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abc5b00a3b3---xarovez.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/liverowebofoze.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/57842138453.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16086da2417d3a---jerujidirozego.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/k5nupcm7s164avifdhitump5c6/95510380430.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/da9664c45085a79e71e8247b505cf339/ketofodububuduletok.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/oldgb158mje20gn3raj7rb5n30/rimejonigufexagetoko.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/45bbde1ce83db2668f185e700c2a3f5d/12916448070.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_off0000f80c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80C 10268 bytes
SHA-256: 7fbfb4f7ddee34df84f500262304729756c6b16962ef5330664d0bdccb6b3d0d
font_01_sfnt_off00010f34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F34 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12746 17308 bytes
SHA-256: 3f0b21a77817e84fb63192b495822136325149739136de155b97387936705333