Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3bb7f66d26deb7d…

MALICIOUS

PDF

89.3 KB Created: 2021-07-14 06:05:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d7dcfc3aa647ded8ceb38f92fc87121f SHA-1: 63b93e7c0e76ceb71c88a48e861da6f02200d0fe SHA-256: c3bb7f66d26deb7ddede157479dce5e4710f256fe4655ff16c44eb2e12606059
156 Risk Score

Malware Insights

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

The sample is a PDF document identified as malicious by ML classifiers and ClamAV. It contains numerous links pointing to compromised websites and disposable hosting, forming a link farm. The primary attack pattern involves directing users to these external URLs, which likely host phishing content or further malware. The presence of multiple compromised CMS upload links suggests a broad distribution effort.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • 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
  • 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://garglob.ru/uplcv?utm_term=television+production+pdf PDF link annotation
    • http://drairtools.com/ckfinder/userfiles/files/sorududejuwolani.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160825be88f32c---wisilip.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/90a22d4119d07dedf5c7fd094fec7957/53332532610.pdfIn PDF document text
    • http://webinaris.training/ckfinder/userfiles/publics/files/21269043201.pdfIn PDF document text
    • https://autotrans911.com/thread/admin/uploads/file/vexoxomixupudigezula.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfbe7b8be35---46963526821.pdfIn PDF document text
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/pekeputudisobare.pdfIn PDF document text
    • https://olympicwroclaw.pl/zdjecia/fck/file/14525245048.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160882c737f201---wivumuge.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/ba576efd9344943ebf49127527826b24/94179147890.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160849ba6f379b---dazibob.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c48bb7c4c25---90880674675.pdfIn PDF document text
    • https://podimercrm.com/img/files/genufonupa.pdfIn PDF document text
    • http://alumcity.ru/userfiles/file/somakolasajegupi.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/6e7172792d7d1a8c33db728435053d6c/zowedobibupok.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160786e4857d83---bubonilojavokabo.pdfIn PDF document text
    • http://doorsatyrau.com/ckfinder/userfiles/files/64153195896.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a72652d0cc2---44768321892.pdfIn PDF document text
    • https://majubesar.info/contents//files/fazuzebukomodisajakoluzat.pdfIn PDF document text
    • https://proxus.nl/file/bodakesasugamuba.pdfIn PDF document text
    • http://cancercareresearch.com/userfiles/file/82430975127.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608139036ade6---301641487.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/4572536b91c20db317aaa89a8e54e818/30218524558.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_off0000fadf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADF 10580 bytes
SHA-256: dd4e43c5a0f5812b2ba8b6d651d0d8d847244b09d5380ca2d0ef7df3e119138b
font_01_sfnt_off0001132b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1132B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B3D 16988 bytes
SHA-256: 597563a4968fb9b6b96790fad34e9dc681e12b8240427a624ef1467695788929

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