Malicious PDF — malware analysis report

Static analysis result for SHA-256 405934dc611cfe51…

MALICIOUS

PDF

68.0 KB Created: 2021-06-11 00:17:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5d01e3161c7bbfb03d6b1c3f28564be1 SHA-1: 54849d6f561e142497983ea804586f07813e9a3d SHA-256: 405934dc611cfe516ca18a6b53776de3ab15bea9c6a9b094f435dcb4948bf878
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9710

Heuristics 5

  • 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
  • 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://drafthe.ru/uplcv?utm_term=kingroot+android+7.0+download PDF link annotation
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/d9uerhmg76ha2qo2h147l5qrk0/foxipinedorusarekewa.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/ck16u3euj4o5lk941hsupjbm32/96276295995.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/biwopofukutijego.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c97b4ea613---mutojitalade.pdfIn PDF document text
    • http://stevis.cz/files/file/rifawarivad.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/17639279548.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/43605a530483539bec1ca35dd1c59796/suwizigemadejuxilunofib.pdfIn PDF document text
    • https://ebooksweb.net/files/file/26660744059.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/fizufavakipodupafiminek.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/taligivorarututubuma.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/4f3f2b1730e6c2612fe2b79c59685122/12511910716.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/nedorijukepexenakowijito.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/oekog0kab83thgfu72p5pa1tlh/gubujezigoragipud.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c27f4f9f363---xerabezedobasamojixowefa.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/f0b0b8d8ea8be8946b7c11745e5ab2c8/58816210752.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/13fe7e92dcb81275c5995bb8d6b9e70c/53648798876.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B2 5128 bytes
SHA-256: 687932bc40519f64acf326854d2e4b31214c60dbe6c5086ff413d6b49927e81c

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