Malicious PDF — malware analysis report

Static analysis result for SHA-256 f224c7f62ecc61dc…

MALICIOUS

PDF

80.6 KB Created: 2021-09-11 11:10:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 87e2546112a7e35a2d9dd546aeea18f2 SHA-1: 6696723524e5caf913cb02290a940c51a2908836 SHA-256: f224c7f62ecc61dcd19746c967ada0a8f5aae3be3baef72a2821daed23e4d84f
164 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of multiple external links, including a link farm pointing to compromised WordPress uploads and other PDF files, suggests a phishing or malware distribution scheme. The heuristic 'SE_DOWNLOAD_BUTTON' further supports the idea that the document is designed to trick users into downloading content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://kisikana.hr/UserFiles/files/wisir.pdf In PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/e04d96418a29334289595a9ca87b60db/18571006219.pdfIn PDF document text
    • https://electroagro.es/pub/files/68207256455.pdfIn PDF document text
    • http://siamsnail.com/media/userfiles/files/miwavuvexafezojajuget.pdfIn PDF document text
    • https://apz-arte.com/ckfinder/userfiles/files/norewa.pdfIn PDF document text
    • http://lineshare.net/upload/files/20210901193013.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/42c50740506bfb968c7059f379f40fdf/20739492968.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/161342fd70e0c9---3403616798.pdfIn PDF document text
    • http://fanti-fitness.pl/uploads/assets/file/56699968507.pdfIn PDF document text
    • http://111-orte.com/testarea/cwsCMSlight/media/files/fumesusuzojopebida.pdfIn PDF document text
    • http://artgraf24.pl/userfiles/file/fusadanexekemu.pdfIn PDF document text
    • https://nichecnk.leaddeehub.com/userfiles/files/nirinuwujolobon.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/35379795266.pdfIn PDF document text
    • http://kitpaisal.com/mypicture/file/kazefurufigapuvu.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/161313ee6214c6---97490082782.pdfIn PDF document text
    • http://superazs.ru/images/news/file/10829759446.pdfIn PDF document text
    • https://0286869143.com/editor_images/files/87676108271.pdfIn PDF document text
    • https://pacientes.quiroser.com/UserFilesQUI/file/fotevisojanofafiboba.pdfIn PDF document text
    • http://www.bash.cl/media/file/wukejexetibapesoti.pdfIn PDF document text
    • https://mrpressconsulting.com/UserFiles/file/bipufonivefabijoruki.pdfIn PDF document text
    • http://integrotech.eu/zdjecia/file/59882353255.pdfIn PDF document text
    • http://kingkady.com/uploadfile/files/95344316069.pdfIn PDF document text
    • http://emannsltd.com/userfiles/nuresixudotapeleni.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=data+hack+apk+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_off0000d561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD561 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED78 10300 bytes
SHA-256: e743119b5746969bb371bf5971a67ec47776ec94cca42668a7840147c3d48541
font_02_sfnt_off000104b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B1 18988 bytes
SHA-256: 29c7b7e1272353f0cc622d750e251e2dfd2849537e5ddf38bed515c6a4d8e7da

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