Malicious PDF — malware analysis report

Static analysis result for SHA-256 342ba6ca86286373…

MALICIOUS

PDF

86.1 KB Created: 2021-08-13 23:42:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8b5c4672673f5ccf211317deb2ba04ee SHA-1: 9fcbee8dfebc087efa7975b1d07827aa6e274eae SHA-256: 342ba6ca862863735e53e9b901ffc096f6ad56bc0ca92d2767406bdb5dcc4e24
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection

The PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. The presence of numerous links pointing to compromised WordPress upload directories suggests a link farm designed to redirect users to malicious sites. No scripts were extracted from this sample, but the overall structure and URL patterns are consistent with phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://catamma.ru/uplcv?utm_term=functional+organizational+structure PDF link annotation
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16099a0963e2cf---ferufajonolevokilelaxelek.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609952109819b---kikuwujususidog.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160da2a0eb2c41---15732653431.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/b10a5d18500cabe6a62f0d12e85bf920/25765021049.pdfIn PDF document text
    • http://ukicda.com/admin/fckeditor_upfiles/file/2021073107440780554.pdfIn PDF document text
    • http://ji-tien.com/userfiles/file/xuzikeditasizozipuba.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b8379011b---75802940826.pdfIn PDF document text
    • http://ibiforstarlight.ca/clients/3/3c/3cfcca4e360ca8807b7dd7d6e7cbeae0/File/11830362043.pdfIn PDF document text
    • https://residenciasanamaro.es/userfiles/files/mimuse.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/38690391948.pdfIn PDF document text
    • http://hermanosgolbano.com/admin/fckeditor/editor/filemanager/connectors/phpfile/71711439879.pdfIn PDF document text
    • http://architettoseneca.com/userfiles/files/95280554510.pdfIn PDF document text
    • http://m4klynchburg.org/clients/3/34/34420611de4c9c7593cf5e5fe12de6df/File/wazakeluxedofetetepibu.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/53640827874.pdfIn PDF document text
    • https://xn--b8qxb801j.tw/upload/files/22469584572.pdfIn PDF document text
    • http://chromowane.com/userfiles/file/zizekaxaliwevosavuwu.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/fasud.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4c821c818---45437015478.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/14326601726.pdfIn PDF document text
    • http://cnzhongkui.com/fckeditor/editor/filemanager/connectors/php/uploads/file/140955398758.pdfIn PDF document text
    • http://thienlongadv.com/upload/files/65579127418.pdfIn PDF document text
    • https://toolsatool.com/userfiles/files/wozowapipilawa.pdfIn PDF document text
    • http://berbun.com/user_img/file/kaxosefuduwedunolos.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/487add270c38417b964e2a72833e34b2/34467585019.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_off0000ee83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE83 16688 bytes
SHA-256: 461aac965e29f747368adfdb882341812e93f04ac6c07bb2315807bdac7e0983
font_01_sfnt_off00011963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11963 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001317a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1317A 10544 bytes
SHA-256: 5dc8827eec1d80294798486ebe5076bba59d10f6a876ab3c234d6e71792b8cb7

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