Malicious PDF — malware analysis report

Static analysis result for SHA-256 07bdf89475d73506…

MALICIOUS

PDF

68.5 KB Created: 2021-09-19 10:19:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: a85c674614c7936700fe65efb934c142 SHA-1: 2da9f36c7cb85948a7d87ac03a4170cf79700c62 SHA-256: 07bdf89475d73506a37f20ef4ded5565f6bd7193a6ad2e85692d49546b4f3baf
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF exhibits characteristics of a phishing lure, including an image-only design and numerous embedded links pointing to potentially compromised or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs suggest the document is intended to redirect the user to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://ihappywash.com/uploads/files/202109160849432851.pdf In PDF document text
    • http://parateam.cz/file/fabujega.pdfIn PDF document text
    • http://zenithmetals.com/files/44666485832.pdfIn PDF document text
    • https://muzpony.de/obrazki/file/tosafupobokedeno.pdfIn PDF document text
    • https://lanhcongnghiepthinhphat.com/upload/files/7606049395.pdfIn PDF document text
    • http://ozdoby-betonowe21.pl/Upload/file/24015426814.pdfIn PDF document text
    • https://appvid.eus/userfiles/files/tejegepuzikafidenopipeko.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613da076c67f0---dutunamiwimirupet.pdfIn PDF document text
    • http://utcsp.rustyramone.com/uploads/files/viludurowemepopu.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/8ec999c24e6f3b2116ae16e4b22d0828/17895502747.pdfIn PDF document text
    • http://www.pibmg.com.br/ckfinder/userfiles/files/files/77436835297.pdfIn PDF document text
    • http://easyhypermarket.com/userfiles/file/menig.pdfIn PDF document text
    • http://carrollcountylawyers.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mixikozudojagaf.pdfIn PDF document text
    • http://artgrafika.cz/userfiles/file/vixifitamigewavoti.pdfIn PDF document text
    • https://sabagdasarov.ru/upload/file/11638221763.pdfIn PDF document text
    • http://dolphinkorea.com/files/files/36594738844.pdfIn PDF document text
    • https://aldwalia.com/userfiles/files/75116430816.pdfIn PDF document text
    • http://studiozoppini.com/userfiles/files/49110388608.pdfIn PDF document text
    • http://opgzvh.hr/upload/file/96955791594.pdfIn PDF document text
    • http://winhazel.com/indigo/ckfinder/userfiles/files/rewusibukixivoketasasop.pdfIn PDF document text
    • http://dbcasagayathottam.org/assets/uploads/cms_images/files/pisemovegubaguli.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/1ccbd5f470d5d5caf01b34e0b5e07932/lonabexadipawaju.pdfIn PDF document text
    • http://devveb.net/userfiles/file/67107870787.pdfIn PDF document text
    • https://renetravel.ro/images/files/65812309107.pdfIn PDF document text
    • http://plan.msu.ac.th/ckfinder/userfiles/files/62891255151.pdfIn PDF document text
    • https://ariaparvaz.com/basefile/ariaparvazcom/files/tijerozata.pdfIn PDF document text
    • http://klusjesindex.nl/images/uploads/76116365427.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=ps2+download+androidPDF link annotation
    • 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_off0000b270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB270 10216 bytes
SHA-256: da99a6c053426833b4f6e147ce5118c24a73ccbf171994e1c2837da4225e29a5
font_01_sfnt_off0000c98c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC98C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e19e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE19E 14060 bytes
SHA-256: 1c6128f8ef1fc805eeff1a9d8eb380e24037b5ce2181622d863d30e1394cb520

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