Malicious PDF — malware analysis report

Static analysis result for SHA-256 293b5c2e8c57468e…

MALICIOUS

PDF

86.2 KB Created: 2021-06-27 22:22:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9a02f157855bdaeec53afbee5b0be232 SHA-1: abd77d9788ab75cefb9b556c272d3a1f0b68cabf SHA-256: 293b5c2e8c57468edcf989c3084190ced049a2ed00562a32d032030da4ecd2c1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The presence of external URIs and link farms indicates a likely spearphishing attachment delivery vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16096b58520900---51210693627.pdf In PDF document text
    • http://vizit-k.net/uploads/editor/files/zubot.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/f5b8u69c6e24q5492drsh7jiie/13960128526.pdfIn PDF document text
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/0ee9586b9785f895c390d72fa89c9cce/31586831157.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/16078ab4bee640---28560413272.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/fagobuxajigij.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607453bd1c6a9---vorube.pdfIn PDF document text
    • http://goldenteriyaki.com/uploads/files/deviterugubemufikuzinoj.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/rboif36695dkujjhn1e06k1hv6/kagolijolopoj.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160965656547d7---17981860765.pdfIn PDF document text
    • http://profil-metall.de/content/uploads/file/2497422373.pdfIn PDF document text
    • http://tbff-bygg.se/img/files/50614477028.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080fb20a9561---nafuragelesefelulore.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bb6c0ac351f---99732961215.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b36006a3be3---20899845790.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/tf1td97pu4fp875lq830ol3aq6/dakalaxufimoxawodewafagel.pdfIn PDF document text
    • https://aykutemlak.com/upload/ckfinder/files/31973965125.pdfIn PDF document text
    • http://tlproduct.com/userfiles/file/5660815155.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c024194fd7b---85218179503.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/aq2pr4n0j8r9um0vcmafnsdi50/57381154437.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a7156d6d6---77537146278.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc49eb8cf6---17840170919.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/1b669d776f1a656a49596a743921152a/nefobizafenurerunositole.pdfIn PDF document text
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607429eae9174---54093795151.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=outer+worlds+minimum+specsPDF 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_off0000ef01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF01 16812 bytes
SHA-256: 22425926da385a70058352ac4c73551c32a1e11d4538a2c7315f9505e68e94d4
font_01_sfnt_off00011ac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC2 10724 bytes
SHA-256: e4079cad6c622db7de5fc8b82c9cc93586585346cbb8125099d84750fbb78d79
font_02_sfnt_off0001336d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1336D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1