Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dea6fac91c915c5…

MALICIOUS

PDF

85.9 KB Created: 2021-06-29 07:02:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 279554d2d031e726217cd50a2b0cd11f SHA-1: bb435987db098bed4415e0d8fb729d5fd4e69355 SHA-256: 7dea6fac91c915c5cf9bee3737d59d9f1079736cfa55a5955c5a19c6adc2b874
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to redirect users to malicious sites. No scripts were extracted, but the structure and URL patterns indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160742aaf89e50---19927406272.pdf In PDF document text
    • http://sbsinternationalschool.org/sbsisnew/userfiles/file/95067640899.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d51f8c092f---19555062291.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/potutowenajofujuwezo.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/91551785745.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c13acacdff9---mezominuneboruruko.pdfIn PDF document text
    • http://mpu-beratung-brendle.de/userfiles/file/fimubiroxiziwizagijotisel.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/cbk2673dhqgdc0avia77i9dgs7/sebiraxupekitiwevema.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d98e7d1e89---83806885185.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb69153a383---novolir.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/fcug00m2mfk7vk81n8jj6m75bc/sozimexapididisuvidudar.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/qp0clfbecus8l5rk9nc5jiehv8/65279634382.pdfIn PDF document text
    • http://evola.it/userfiles/files/dijimufubawipaxaror.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608191d4e00f8---gagunejimedun.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/1f044f39ac0f29102729e0c97545d555/30894489003.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/856f54ad74e9ea5565424a1f9c2db544/rovenu.pdfIn PDF document text
    • https://hometeamcorp.com/images/usr/pemanure.pdfIn PDF document text
    • http://allg-gyn.ch/userfiles/file/70745068770.pdfIn PDF document text
    • http://tiszaikaland.hu/upload/file/lafewutew.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/ade7ffd5915140674d048dcf5218b24a/9737009384.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b2b6a1e0e---dekukexoxexunegasal.pdfIn PDF document text
    • http://josephlillianmorrisfamily.com/clients/59960/File/jakurovuwuromasan.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/933e195aa228d8d2c5b7dd07381594c9/jebawesodivimiti.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/wifilujogibolatarojura.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=how+old+do+i+have+to+get+a+tattooPDF link annotation
    • http://pro.ovh.net/~tribuene/images/banque/file/zonenixafulesedegusow.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_off0000ee06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE06 10300 bytes
SHA-256: 04a3e8f8d54aed5d4eeeb55ea85815d9fe209b873bf33f592daad21237b5fe58
font_01_sfnt_off0001051b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1051B 17268 bytes
SHA-256: 069f4be6d3106ae17da1035892b4d16dd2010f7a0df30056d08cf047fc8e190f
font_02_sfnt_off000131de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1