Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e0ffbddf3ec40a1…

MALICIOUS

PDF

83.5 KB Created: 2021-08-16 22:01:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: de59196a7410e7eb8cc0570bd209e7c5 SHA-1: c30908e34764f6bf36013bcd9324f097b4a9908b SHA-256: 0e0ffbddf3ec40a10dfb51f428fbbffcf089aed9521055dc059468e502a01ba5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS uploads. The document body is unreadable, but the presence of numerous links suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://tekmaker.com/upload/files/34992928559.pdf In PDF document text
    • http://avstralianature.ru/ckfinder/userfiles/files/93738548876.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd4df909154---23971517787.pdfIn PDF document text
    • http://degeninhotel.ru/admin/ckfinder/userfiles/files/5258762516.pdfIn PDF document text
    • http://rykatd.com/files/74796937925.pdfIn PDF document text
    • http://www.asslar.de/downloads/62737188325.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/nh358oaperpk4ikf50ipd02gpr/vugiri.pdfIn PDF document text
    • http://allasclub.com/campannas/file/24404945666.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16107da90a86a3---xupuwone.pdfIn PDF document text
    • http://primehorseproperty.com/userfiles/files/1944595420.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/cvkoi6e58586du7a1p0a84uts1/37907344996.pdfIn PDF document text
    • http://www.physedu.in/newsite/userfiles/files/gitosodoruzunewimoxabof.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/6097ca83f033eafc08693f82cceff10b/57659521752.pdfIn PDF document text
    • http://wimborst-ceramics.nl/public/view/upload/fckeditor_images/file/jerogipeboniruwinupinu.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/jikofitotewejigojuwugeb.pdfIn PDF document text
    • http://barnesfamilyre-union.com/clients/52050/File/71558390918.pdfIn PDF document text
    • http://selfmadefilms.nl/userfiles/files/81211040306.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/fosumu.pdfIn PDF document text
    • http://forglory.cz/ckfinder/userfiles/files/78390026840.pdfIn PDF document text
    • http://assotechne.eu/userfiles/files/47188810874.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/likozilukazixa.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db6f89a7da3---zifewol.pdfIn PDF document text
    • http://escqatar.com/uploads/userfiles/file/file/maloxumuluxunufenomowinig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=hindustani+raga+notes+pdfPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e29e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29E 17016 bytes
SHA-256: 6c78860075f6977f2779eeb23c02513f94481da77ec3d269fc6be151f2a5b044
font_01_sfnt_off00010fc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000127dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127DC 10720 bytes
SHA-256: b5679b332e7024b16c1fe0671d0435e7f3a999eb1d654a3537a50ddb133a3c60