Malicious PDF — malware analysis report

Static analysis result for SHA-256 65780a5e256a52eb…

MALICIOUS

PDF

82.7 KB Created: 2021-07-01 09:50:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: d973ef9952eeda6a8fb44aa3b0ec26a6 SHA-1: aeabb17cd6cebc361c435a37a64fb5641603ba21 SHA-256: 65780a5e256a52ebe52137d68c584b443481bfe7e0b602546465b9b37307803c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, likely intended to redirect users to malicious content or phishing sites. While no scripts were explicitly extracted, the nature of the link farm and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic suggest a potential for malicious JavaScript execution or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://afgventuregroup.com/cfiles/file/gojotamebupusajebozu.pdf In PDF document text
    • http://abwlanham.com/uploads/files/59017913527.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/12453113399.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b8255de33b---52843666243.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160823ac58ce35---lejuzajitod.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160714780b82d4---wugolupa.pdfIn PDF document text
    • http://lucann.com/Upload/file/39902668081.pdfIn PDF document text
    • http://oodow.cn/upload/file/210624030547858283gzehtjmszm0f.pdfIn PDF document text
    • https://henklinders.nl/henklinders/upload/files/76044869205.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a7deb8f1c67---pewawosoribuvifu.pdfIn PDF document text
    • http://sahamit.net/userfiles/file/83777511186.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2a7fd95bf---gifuwatuful.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/2bb0ca6ea68c26edf7373515db39522f/2406421251.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a88181419f5---wagowefosusalixonudowupuj.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac67d2d695c---4627434026.pdfIn PDF document text
    • http://newdimension.su/userfiles/file/sesazepomuvokijunetotupu.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091039a01eff---56347322925.pdfIn PDF document text
    • https://deniz-sogutma.org/img/userfiles/file/33790101400.pdfIn PDF document text
    • http://bioterapiazabiegi.pl/obrazy/file/pekibibejakoru.pdfIn PDF document text
    • http://activesolutionelectric.com/images/file/67496001774.pdfIn PDF document text
    • http://deauville.ru/files/file/81365676701.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070eb8605b6b---65528148320.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=made+easy+handwritten+notes+civil+engineeringPDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f7c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C9 17124 bytes
SHA-256: fedda9b600f989461f3e6ef7b37f125d182117471469be5c1ec2f2c6fa1dc52e
font_02_sfnt_off0001246a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1246A 10908 bytes
SHA-256: 11c079ca84b41dda1e32fd90c135cb9269ef16f4d114d5d6904ddb0290fbb08e

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