Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cb809d85feb5aab…

MALICIOUS

PDF

82.2 KB Created: 2021-08-21 17:05:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b11776bd563cac482504308480cb800c SHA-1: 28ea1d1a28117f6e63e46dee93cdaad114606c54 SHA-256: 5cb809d85feb5aab5a0217903ec0789e4a12b85fe7422e08d3077f2bc55a543d
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a 'Password-protected archive handoff' heuristic suggests the document is designed to trick users into believing they need to download an archive, which is often a method to bypass gateway security. Numerous URLs pointing to compromised WordPress sites and disposable hosting further support a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://laborke.ru/uplcv?utm_term=what+is+a+good+sentence+for+the+word+boasted PDF link annotation
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/qpcp8655nnlfucsae0r9tcu8h5/gajigamarekavuretogek.pdfIn PDF document text
    • http://zhfangyuan.com/uploadfiles/files/93669889784.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/a1aeca40e7c6da63442daed4440b9061/61488677574.pdfIn PDF document text
    • https://abctranslink.com/ckfinder/userfiles/files/53786866100.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/ec4e852cd67594ccfd4aee0906a9c3f3/45647748288.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/61049828afb2765afa18adcbb7de67e2/xubezowenegajenulelobex.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607be39532008---nesasufebuzatojevimiw.pdfIn PDF document text
    • http://www.vljainandco.com/userfiles/files/97270960652.pdfIn PDF document text
    • http://aimic.com/userfiles/file/bavidegufezusevotewowivo.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0ba9597e5c---pawosibulivigowabimi.pdfIn PDF document text
    • https://laughteronlineuniversity.com/images/upload/files/83963881758.pdfIn PDF document text
    • https://macronew.com/upload/files/taritavadurer.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/d0b580967fbe2ccacdd6e723b814c4af/77576474811.pdfIn PDF document text
    • https://nbcmedia.vn/ckfinder/userfiles/files/71095794413.pdfIn PDF document text
    • http://www.ddu-hk.cz/ckfinder/userfiles/files/19203268709.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16070f04ba1176---34376784663.pdfIn PDF document text
    • http://starcity-vinhomes.vn/app/webroot/img/files/97753228614.pdfIn PDF document text
    • http://lineshare.net/upload/files/20210716093242.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610554a95d1cc---xivibikij.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7256d14efb---gubul.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/1d5cd97e63e2e7979c58e99fe32c2153/48323508667.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/822636fd9e8fee7a76ead65227443e17/10228619140.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e0d2c4926---75387622988.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c887ae55ff0---44790052373.pdfIn PDF document text
    • https://isleo.com/i_photos/file/65280194470.pdfIn PDF document text
    • http://auapp.ch/userfiles/files/57970818139.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_off0000d9c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C3 10928 bytes
SHA-256: 8f7ac409781ba82e2933d82381bb83484f6ced19b22fe40346f0f26063524780
font_01_sfnt_off0000f2e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010af6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF6 18304 bytes
SHA-256: 9f97a26d375dd2c9b0838c82167cac909bad5f9946b2a373846f40af192280fa

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