Malicious PDF — malware analysis report

Static analysis result for SHA-256 11dce88b30ebaa62…

MALICIOUS

PDF

127.6 KB Created: 2021-09-02 16:47:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3c46e4caac241d462664ddf4e12a6bd5 SHA-1: 19795ce706fd6e19d4d7089aa202bfb877383642 SHA-256: 11dce88b30ebaa628e0ee19c5d88723456c990a219fd6f73fdf294ff865f3589
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document exhibits characteristics of a callback phishing or tech-support scam by presenting a lure that prompts the user to call a phone number. While no scripts were extracted, the presence of numerous URLs, many hosted on compromised CMS upload directories or disposable hosting, suggests a phishing or credential harvesting attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://la-klamm.org/userfiles/file/20680874619.pdf In PDF document text
    • http://fruhmann-elektrotechnik.at/zituwudikunixiwusokoxepo.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609be5a5de50f---jedulexotopufewo.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a0354001194---guzuxawokafoganudom.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/biregili.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/dcf6e4f4e782d546ef293d197bc95eb1/zedasasag.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b56f871a483---27712716173.pdfIn PDF document text
    • http://kanchanaspa.com/ckfinder/userfiles/files/kasafagubemimukuxemifef.pdfIn PDF document text
    • https://sportsslife.net/upload/ckfinder/files/45740059720.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/0816b17151692fbe84dcc3dc9b95d4c3/vevapunapesikinelixodonak.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/cae4832342d89a7e3defd9f6a08b4daa/gawuwazeravenoduku.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/62432660988.pdfIn PDF document text
    • https://havadisname.com/upload/ckfinder/files/xapuxifelakesezisel.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/4bmc5g97phqs6gnpvcckp8ltog/vevanaripitu.pdfIn PDF document text
    • http://bjaimama.com/data/upload/2021/05/file/202105240223569565.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160efeb6ac3c05---pegemefogetobi.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d44394ebdb---75956866318.pdfIn PDF document text
    • http://herium.net/FileData/ckfinder/files/20210726_F83BD410289A4E58.pdfIn PDF document text
    • https://www.solucionaesp.com/ckfinder/userfiles/files/10176917163.pdfIn PDF document text
    • http://waukeganeast1980.com/clients/877304/File/wijevarepabaloxerujojoli.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c62f3c3df9c---42924862886.pdfIn PDF document text
    • http://tribo.kz/userfiles/File/27045138133.pdfIn PDF document text
    • http://fiumevivo.it/userfiles/files/57573369780.pdfIn PDF document text
    • https://gamma-electronics-eg.com/userfiles/files/gokanaxazigufiletuza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=semiotica+para+principiantes+daniel+chandler+pdfPDF 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_off000189d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x189D7 20308 bytes
SHA-256: 5ca05fec0ea6dc4225df148020e78cbc64fe3419069790e0fd6351ea45efe839
font_01_sfnt_off0001bf0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BF0D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001d724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D724 10960 bytes
SHA-256: 2a68190c5f6a0a7a57dd6aea1c876021c90f888dea6968a09b611642979ae1ea

Open this report in the interactive analyzer, or submit your own file for analysis.