Malicious PDF — malware analysis report

Static analysis result for SHA-256 151a5862b1d64821…

MALICIOUS

PDF

80.2 KB Created: 2021-06-30 08:04:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 93ebcac3e5ba6269236af65599014730 SHA-1: 0211ed5b0091125711a3fdc0bc99aac3f297ff33 SHA-256: 151a5862b1d64821950dc249e27060ac44408a5d1a0ab3208528394a7eb785e5
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These URLs are likely intended to redirect users to malicious content or phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://irlanc.ru/uplcv?utm_term=tom+feelings+middle+passage PDF link annotation
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e0f7001a4---90827870478.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/42b080b62bdd0e4226c8bd2696a1dc7e/mezuvudotufika.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/xuvominubovo.pdfIn PDF document text
    • http://shukokai-voves.fr/userfiles/file/82490214607.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/jd9cuelo1e70ndp8mnevqv9egk/kuxepafewowirixasedamored.pdfIn PDF document text
    • https://etre-cheval.fr/Applications/MAMP/htdocs/etre%20cheval/news_pix/file/kebogeroveda.pdfIn PDF document text
    • https://facades-et-traditions.com/actualites/file/12579622435.pdfIn PDF document text
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/b93c6295e9d2ce46f41d4869f5a52550/21332921843.pdfIn PDF document text
    • http://hoteldanang.vn/uploads/images/files/tezenuwewufakopulasona.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb55826f13---zunerajutidaniwemaf.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/f1aa531ee036aedcb0b1c6d355e666c8/delujowogedaj.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160d1f37481ffb---pivalapuvuzifowex.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160742627973ae---97349634731.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fead488f8e---pavikedofofukuxufi.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/5fc4032f61e1a5b91126da00a3a12e0e/77017130381.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc1d775e40c---27002600626.pdfIn PDF document text
    • https://juniorclublivorno.com/sitonews/images_upload/files/jivupadevolut.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/biwofazuxa.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/072f025dc36f0810bf95bb73725aa52a/90055867574.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/peuhmccc3fl57jeh6lknpi0m88/rapumakepalixopimo.pdfIn PDF document text
    • http://www.onlinetemsilci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082893d324b1---zubafexupufupewoz.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/7a291dd49ecd7e3d0ace1dd204e6d742/62925446288.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca3075857d6---26566106429.pdfIn PDF document text
    • 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_off0000d629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD629 10604 bytes
SHA-256: da1c4348e270ff6aefad96b054e4c6984bb63ea22773b6e3e2d305d39b9c272a
font_01_sfnt_off0000ee1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1B 17000 bytes
SHA-256: 00800e8f760f2d1589ef47159da0820b0dc05c91c337fc9a207014afe4cf8a20
font_02_sfnt_off00011a38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A38 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1