Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd0ca93c4c78ae21…

MALICIOUS

PDF

125.3 KB Created: 2021-06-25 20:14:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2191be679d67c09f361d4d969d1b1a59 SHA-1: 1ece468837fd2bd3191fc0bb867ec8514eb3bcda SHA-256: dd0ca93c4c78ae2171f078a610aa2d41dd3163693a1a2181d206ee81f8426ad3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to host or redirect to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure or a downloader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9897

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://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/04a1c5bdff22e90d377b6ae78f3b6a58/57751446150.pdf
    • http://amandatravel.com/userfiles/file/lutorig.pdf
    • https://prospr.fr/ckfinder/userfiles/files/xovidafit.pdf
    • http://kleinschaden.expert/userfiles/file/papegesawuxufazuwa.pdf
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc4ca6b8ec---15829702077.pdf
    • https://clinic4lab.com/upload/ckfinder_temp/files/20210623044144.pdf
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/7fe0fc59fe829ee897dea035fe044233/fejowibevejipis.pdf
    • http://aftckwt.com/uploads/file/moralepolemar.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/6qqmo7j1pg65rnsm3ren0t8cp0/88219191249.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f88c9241fa---toturipobexerev.pdf
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160798058ecc54---wulorisigumazolenuga.pdf
    • http://castrolmintabolt.hu/images/upload/file/11265625029.pdf
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607568d568f6c---26253061976.pdf
    • http://www.heksan.com.pl/file/48322274765.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160c32253b3f23---wugesizedafetokamajogibo.pdf
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c0fbcb42ac3---mazuxuburus.pdf
    • http://alliance-ltd.com/userfiles/vuziloniposoliraramodexu.pdf
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/faa9548909ebf230a1f38b0ca7582473/dobirevewedewe.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160761bae0e863---ruvesewuzuworejigimijekon.pdf
    • http://au-zlato.sk/upload/files/25707704233.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4d672cc4c---mopijabara.pdf
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/31205c9abe209d72e3840f5ecc9454a2/gofogad.pdf
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/bfdc5d1d67328f3a4a59b66686ed88c9/14433703470.pdf
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/544637c9db600abbc1a52de72c2d4d41/78446885498.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=selection+and+projection+operation+in+relational+algebra
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016a63.bin
afe31f00e3ce948397768003e46f02b8aa40f53345b653477972325d817ad632
pdf-font-stream PDF embedded font (sfnt) at offset 0x16A63 19560 bytes
font_01_sfnt_off00019e4b.bin
aa0554af7b7f57ad09a754f567b0ae7b2d569873e3b2124c73ded2b79f8fe966
pdf-font-stream PDF embedded font (sfnt) at offset 0x19E4B 16888 bytes
font_02_sfnt_off0001b5e8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B5E8 16792 bytes
font_03_sfnt_off0001cdff.bin
c9b6775e314a2be6a494e0616f763ca5e34cec123822b983067c200ea5bcdaf0
pdf-font-stream PDF embedded font (sfnt) at offset 0x1CDFF 10864 bytes