Malicious PDF — malware analysis report

Static analysis result for SHA-256 8962b47838d11b49…

MALICIOUS

PDF

76.6 KB Created: 2021-09-12 09:16:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3758b00d62934037d40dfcb9508ff0bf SHA-1: bebe6dfbdfd0c7eea2811c2e141c0df0bad3bb22 SHA-256: 8962b47838d11b49899c24756f54b4f2b002ee0b93c6ef71e395d234b914238c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains a link farm, directing users to various websites, including one with a URL suggesting a game mod download. The presence of multiple links on compromised CMS upload storage and disposable hosting indicates a phishing or scam attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://allytemp.ru/uplcv?utm_term=simcity+buildit+hack+mod+apk+download PDF link annotation
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/16138a90f08cb1---58783127067.pdfIn PDF document text
    • https://www.notusweb.com.br/ckeditor/ckfinder/userfiles/files/45414945140.pdfIn PDF document text
    • http://www.toptehnik.si/images/18716731708.pdfIn PDF document text
    • https://osakaav.com/userfiles/files/10232231478.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/21059328631.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613b9fb943904---rosigaxozebemodevotep.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/zikofeneloxu.pdfIn PDF document text
    • http://zaintik.org/files/galeria/files/46433349415.pdfIn PDF document text
    • http://tfforming.ru/d/files/60435466843.pdfIn PDF document text
    • http://cyc.cz/pictures/clanky/files/zarujanisoxezowogetupe.pdfIn PDF document text
    • http://kfoodntea.com/dataroom/file/87153195059.pdfIn PDF document text
    • https://oncallanatomist.org/ckfinder/userfiles/files/firigewutorukavudorizile.pdfIn PDF document text
    • https://afma.pt/site/upload/file/nesukuzokutokojegudav.pdfIn PDF document text
    • http://thietbiotoviet.com/Images_upload/files/popedefasog.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc0ed767c5---tesataripitufijasow.pdfIn PDF document text
    • http://phone-server.com/userfiles/file/44504809133.pdfIn PDF document text
    • http://gatewayhotelbangkok.com/upfile_hotel/files/9898393659.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613179497fdfc---tefegokeburaxoro.pdfIn PDF document text
    • http://grandviewgroupresort.com/upload/files/76416382173.pdfIn PDF document text
    • https://gallerylingard.com/uploads/file/57566024243.pdfIn PDF document text
    • http://studioriggio.it/userfiles/files/robedapukojujikofefij.pdfIn PDF document text
    • http://sinproval.it/userfiles/files/98604327728.pdfIn PDF document text
    • http://asupuro.com/user_data/image/file/likabimawuvefibuge.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_off0000c956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC956 10984 bytes
SHA-256: bfe8c1b261b9fe250f91c3ed5d6a525772cb20d374adb6f8b9d2ce0037144723
font_01_sfnt_off0000e285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE285 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fa97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA97 16452 bytes
SHA-256: 0e1dc5bb0107db24bd29444abbca206fd14e03cb374f8f16db4536e2bc50f10e