Malicious PDF — malware analysis report

Static analysis result for SHA-256 b702fbc5324e7ddc…

MALICIOUS

PDF

86.2 KB Created: 2021-06-17 12:35:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 085e3bdb3e1368799ef2e60a727df91f SHA-1: bdaaead1efe05887bf48d82c555cbcf95ff2f4ba SHA-256: b702fbc5324e7ddc5c03a14b78223fc154c4bb3be20762e9eac771932ad7fbbe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

The PDF document is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It leverages a link farm hosted on compromised CMS uploads, specifically WordPress sites, to distribute further malicious content. The document's content, disguised as a technical manual, is a lure to encourage downloads of these malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pistant.ru/uplcv?utm_term=trimble+s6+robotic+total+station+manual PDF link annotation
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16072d0a402d0a---vikexenepadexinorobigitur.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/bc27b16f6eb19c50a78bfa9072c0192e/13183070822.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/zifisiwove.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/17989347605.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adf75e5a2e3---susunomilotevani.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/zekup.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094bb063d40e---61321548822.pdfIn PDF document text
    • http://meyanko.com/userfiles/file/%5C/fekamuramu.pdfIn PDF document text
    • https://bcbc3399.com/upload/files/61232596571.pdfIn PDF document text
    • https://narimasu-chintai.net/jcfiles/file/82375391570.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3444ec3618---96788783462.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c943d77f9a6---fopalisaxar.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/4650298878f7dc7f513fdc195aff81a9/kosol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F49 5188 bytes
SHA-256: 35c37e3984c9b8e74aa9d3440ac691b795e7d3e7c1e822483232849cb6022910
font_01_sfnt_off000120d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120D2 12260 bytes
SHA-256: 3433856028d25972310f50989aec573accd05dc36f7eba381868e34f79f77579

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