Malicious PDF — malware analysis report

Static analysis result for SHA-256 705f1b94b522fc16…

MALICIOUS

PDF

87.2 KB Created: 2021-07-02 14:37:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ac79bfc7945587f94a11261f13a07b06 SHA-1: c53dda48d5e7a928f11f1060087622156c5bbb31 SHA-256: 705f1b94b522fc16779eb52a2bde08da0b9780f225c53409813742e9626ec05f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous links pointing to compromised WordPress sites, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or phishing pages. The presence of embedded JavaScript (T1059.007) further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/6kqno37gt2utkv8qh18c2dti50/tefasonidegonu.pdf
    • http://www.contectrade.hu/fckfiles/file/ruwusaxinugaxiloruzafura.pdf
    • http://dspec-car.com/js/upload/files/53168122537.pdf
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef6c640355---1929411451.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160936633ccd81---rilowu.pdf
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160d20aeaef1bb---7615949921.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/56483524302b92f0017029adc8d66e60/tifegujonowixejazoz.pdf
    • http://congtydaihai.com/upload/files/28357870619.pdf
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/2b457f4dede3f1fc32f5bb2b76dbb776/97915543628.pdf
    • http://writtenmail.com/upload_images/file/29512596910.pdf
    • https://toolsatool.com/userfiles/files/9629189782.pdf
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/160805e9d3adca---38029952063.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/f4b7236a4036c97fa85afe7b02d87a1e/99032521088.pdf
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/786da349967108563fdabad91ac0ad03/duriginakapamedi.pdf
    • http://richiefamilyreunion.com/clients/7/7d/7d03816b951c94fc7c065ced7c7ccdcd/File/83151078138.pdf
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/517487bd3411c2f91c53415ea55380e3/41326292977.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16071ee53a666f---xamabididimiruvafoxanuv.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/a724cad7200bd78a43485358ce3cff44/78184167473.pdf
    • https://alkalacarservice.com/public_html/userfiles/file/nudepatamakarumudo.pdf
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d0cb9e4ae69---kafev.pdf
    • http://mashtalkandil.com/userfiles/file/kobiri.pdf
    • https://couvreur-hautdoubs.fr/internet_new/images_et_fichiers//file/taritodutufakajekuviwez.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=ominous+meaning+in+bengali
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed85.bin
c0fef39ce59b3033e2e480a875efbf8d93cbed21ab2a823e0863d5382f8b84a9
pdf-font-stream PDF embedded font (sfnt) at offset 0xED85 10520 bytes
font_01_sfnt_off00010564.bin
6069558ccc59f553d80ff6e72d2473e215b5cef883e8e83751e8b97029d23e48
pdf-font-stream PDF embedded font (sfnt) at offset 0x10564 19444 bytes
font_02_sfnt_off00013628.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13628 16792 bytes