Malicious PDF — malware analysis report

Static analysis result for SHA-256 d969f8f1bf782c01…

MALICIOUS

PDF

80.0 KB Created: 2021-09-03 20:28:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ccbde7c768c59e3b74597ffa176138e9 SHA-1: 5b51597620e9f3d9ad14d2a0ce4824cf731a7127 SHA-256: d969f8f1bf782c01a2b4ef1d815462a2a63e809223e637146f52497873944a05
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites. Heuristics indicate this is a link farm designed to direct users to external resources. ClamAV and ML classifiers confirm the malicious nature of the PDF, likely for phishing or malware distribution purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/161003790472b8---mobezizaziwatozazopaju.pdf In PDF document text
    • https://eventpro-kontraktorpameran.com/uploaded/files/lesusafamaru.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/e0f695cb51860561300d744273b9bf08/22224686746.pdfIn PDF document text
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/202189230448517.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/pggrbr2sc74rh0n1t266d15v74/wemoperojapo.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160ee42c95479c---zevemufejobabebudazupuw.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082fc92e2710---lofebeparanimitoguruvu.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/nakafojoxifu.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/kalezizozuzepijopaparet.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/87797702844.pdfIn PDF document text
    • http://nyett.hk/uploads/news/files/javujafobag.pdfIn PDF document text
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f183bcd41f---vukejovaxoroweve.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16070436f51640---33221179581.pdfIn PDF document text
    • https://dulsuc.cl/userfiles/file/85675744710.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a73ff07c48b---97461506273.pdfIn PDF document text
    • http://hawkins-kearney.com/clients/f/fa/fa1934e8f236f3272fb98c88546bd003/File/17237143050.pdfIn PDF document text
    • http://machinegroup.ru/img/outer/files/62814501838.pdfIn PDF document text
    • https://ikincielinmak.com/upload/ckfinder/files/notipelesubukil.pdfIn PDF document text
    • https://tiguan-wiki.ru/file/jawolikamukavuzuso.pdfIn PDF document text
    • http://senseoftourism.dk/userfiles/file/59359386723.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff2bb1bab9---kumabiti.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/kinejafod.pdfIn PDF document text
    • http://j-line.ca/fck_upload/file/mubow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=current+electricity+pdf+free+downloadPDF 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_off0000d283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD283 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA95 18356 bytes
SHA-256: 79a6c9456c42ea6a4da55d5b45edb60cda257f9e4599c68524e6b59142b7cec0
font_02_sfnt_off000119a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A7 10776 bytes
SHA-256: 257d6753d28cfe2627c62ba5e27f0706f3c5383f2bc80e295592038c68e104bb