Malicious PDF — malware analysis report

Static analysis result for SHA-256 3019e4c347dd6c07…

MALICIOUS

PDF

85.4 KB Created: 2021-07-17 19:14:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e2dfad924e49de1aedcef65dee8ee298 SHA-1: 8882560fb4c7c4b3c50bdec59e94c6fd42603c4d SHA-256: 3019e4c347dd6c0783a202b8886dbf2c863fe8173373e38080f3ad658cc2f360
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the document functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS uploads. The presence of numerous unknown URLs suggests a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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.
  • 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://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c59809a6d4c---91151128959.pdf In PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160703bc9cca58---79013055015.pdfIn PDF document text
    • http://ukicda.com/admin/fckeditor_upfiles/file/2021071304302280554.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/fhb2vvo3td0fpjd67tm2onse0r/tipoze.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d971b01265---bilofuwizuwodere.pdfIn PDF document text
    • https://dolaodong.com/userfiles/file/molizotavajudojo.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c77cd75fe3b---naxuwoziwateviserira.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/45700002937.pdfIn PDF document text
    • http://dlmberatung.ch/userfiles/files/werolisowikirotoxenizipi.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/64e7c30aaf1908a7e5d3b53e1e6f97d9/wexukisigoxelokezitaj.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/44700cec4f545a7b36d5d11b3d48026e/zuwuvabedejajepejelafa.pdfIn PDF document text
    • https://castilloexterior.org/ckfinder/userfiles/files/kezelagupirez.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/39708343966.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/kinigebib.pdfIn PDF document text
    • http://meadescafe.com/userfiles/file/84594348131.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/zabuwimepuseri.pdfIn PDF document text
    • http://rudolphalexander.com/uploads/files/betesor.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/12643153185.pdfIn PDF document text
    • http://cl-pub.com/files/files/81072192682.pdfIn PDF document text
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/342665215.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/lasisiwituzifagorukifike.pdfIn PDF document text
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/e3o5remsvk4c98ijplisp170dc/zasatofituzokovuwizik.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/atihd3pbq4t26ccj253lf1in65/pakux.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2be1635e6---71436206247.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7edfd87ed---fopinuvutizodubafedawo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=effectiveness+of+online+advertising+questionnaire+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_off0000e91f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91F 11092 bytes
SHA-256: 7b1245cc61edec6aed50e36a9de15d63a6af3b49fddb9b03039c6117802b5c9e
font_01_sfnt_off00010298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10298 17196 bytes
SHA-256: a41de76d8831d1a717b186536dcb7cf8059dd68bd5c85bd4b8afde4624b379d2
font_02_sfnt_off00012fc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1