Malicious PDF — malware analysis report

Static analysis result for SHA-256 baeba73ff4f685b4…

MALICIOUS

PDF

64.0 KB Created: 2021-09-28 10:14:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: da7b03b6194281d40c31b5c4ff90b515 SHA-1: 32d6a0ee94a0487b25dd0603c2b08e567136468b SHA-256: baeba73ff4f685b4ab692f2655e1364a54bafd5e582684bfaf0bdd4cb1f79fa5
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to obscure the ultimate destination. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classifiers also flagged it as malicious. The presence of multiple PDF link farm heuristics strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5956

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
  • 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
  • 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://gianlucabruno.it/dati/upload/file/vufobowasosowuf.pdf
    • http://spbmedaks.ru/sites/default/files/uploads/doresofututeforo.pdf
    • https://at2-turbo-j3t.com/contents/files/dedeme.pdf
    • https://editions-tlp.fr/ckfinder/userfiles/files/51969117149.pdf
    • http://gnatowski.pl/attachments/file/65755285158.pdf
    • http://fourfoods.com/images/files/rexunulore.pdf
    • http://weddingdove.tw/uploads/files/202109221645015034.pdf
    • http://www.europesolidaire.eu/userfiles/files/tegenukodowulasosi.pdf
    • https://stijsr.com/userfiles/file/tuginixetoro.pdf
    • http://columb-sklep.pl/userfiles/file/78256830927.pdf
    • http://honyi.tw/ckfinder/userfiles/file/nedodawedokor.pdf
    • http://zhhyhb.com/uploadfiles/files/65677615103.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/161452fc903b24---32291033893.pdf
    • https://taucaotoccatba.vn/images/news/files/bazenoga.pdf
    • http://hagelkonzept.com/userfiles/file/sesadovokarapetorisino.pdf
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1613e565546267---84315531214.pdf
    • https://universal4shipping.net/userfiles/file/28637979142.pdf
    • https://thuhuonglacquer.com/uploads/news_file/xatuluwo.pdf
    • http://tearose-kitchen.com/sites/default/files/images/imcefile/dabiruneporevakodugo.pdf
    • https://www.psk.com.au/application/third_party/ckfinder/userfiles/files/muravifupofakokero.pdf
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/hq5oo3nf8ucs0euthuaqrlje34/92191043371.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d821d6a9c0---zudobefixosederavelefesiz.pdf
    • https://contemporaryteas.in/admin/uploads/file/37058352822.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=free+live+tv+apps+firestick
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b27e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB27E 16792 bytes
font_01_sfnt_off0000ca90.bin
8013c68e36125bce7fd19a2d998b323ad15bd13958b4b0f1514bd048d8f127e2
pdf-font-stream PDF embedded font (sfnt) at offset 0xCA90 14368 bytes