Malicious PDF — malware analysis report

Static analysis result for SHA-256 7200f4b42d1bd866…

MALICIOUS

PDF

93.6 KB Created: 2021-08-16 15:16:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7229d257d030409554678431f30ebf81 SHA-1: 1b709d0739341c47b94e95616a39a51b894da05e SHA-256: 7200f4b42d1bd866bb7684051104fb5bb1f2b39aca87b3671614b9cd73498aad
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs pointing to various websites, many of which appear to be compromised WordPress installations used for hosting PDF files. The presence of a 'Password-protected archive handoff' heuristic suggests the PDF may be a lure to obtain a password for a separate malicious archive. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://medvor.ru/uplcv?utm_term=las+4+p+del+marketing+promocion PDF link annotation
    • http://deeringbayrealestate.com/userfiles/files/61937630762.pdfIn PDF document text
    • https://zevkotodoseme.com/upload/ckfinder/files/34417802244.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/a9477b1712fdb9599dd154602133ea30/5450131077.pdfIn PDF document text
    • https://aspirans.com/files/file/kelavavesalibumowufale.pdfIn PDF document text
    • http://drentmedischadvies.nl/uploads/files/46573082230.pdfIn PDF document text
    • http://xn--b1akwe.xn--p1ai/userfiles/file/67648052299.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160f74962275a9---dovakefidol.pdfPDF link annotation
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/f32e33031d8d28b78e9717ddd840e74d/62664750622.pdfIn PDF document text
    • http://logistra.fr/ressource/site-image/files/bolazuwikezuzosefadeten.pdfIn PDF document text
    • http://maradonasalud.com.ar/ckeditor/ckfinder/userfiles/files/2633992083.pdfIn PDF document text
    • http://marcus-1.com/FileData/ckfinder/files/20210720_A4FB5C55E224ABCD.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/12230711625.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/3c3t5gq7pam6lm29t34qdc6p1l/39569876991.pdfIn PDF document text
    • http://kazuma.ru/ckfinder/userfiles/files/80065604278.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/61f79f73fc03aa1f59a0043def8d89ce/57812085673.pdfIn PDF document text
    • https://datajournonepal.org/files/80270217777.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/1b490b7f0345cbdeec85a64f0ab51d40/80783060050.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16099c8c86029e---mixajonu.pdfIn PDF document text
    • https://cortemadera.com/wysiwygfiles/file/32351217689.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/6jttsi5ci4mg2cc116p2va9hgo/44539563779.pdfIn PDF document text
    • http://christopherdallo.com/file/dizipopixa.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/dung933i005ijg9rej91rurkb2/mogozubuwibeber.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a03777dc526---pewalavew.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16080af4220358---budafazuz.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/472942178.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_off000104bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BB 10984 bytes
SHA-256: f5ce13870e5a3edd6069493836982d84a770a3d6a0653dcdb5b4ea9d15a8b6bf
font_01_sfnt_off00011e05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E05 19184 bytes
SHA-256: 229ecef2dd2ad0babc6a5ced75b692d68ff13b7b917abf4e63a8c8d73608e404
font_02_sfnt_off00014db9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1