Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ae5e72616391733…

MALICIOUS

PDF

87.9 KB Created: 2021-07-03 02:45:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: df179e674d00b96aa25072162d1eaef3 SHA-1: b8c3ad3170d125d3fd8adbb3dc859a306a4f674f SHA-256: 0ae5e7261639173312af054991f992b7f3cdbae87b77b3fc3d876950da320fa4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs that point to compromised WordPress sites and disposable hosting, likely serving as a distribution point for further malicious payloads. The presence of external URI heuristics and link farm detection rules strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://peneleos.pl/userfiles/file/74822288164.pdf In PDF document text
    • http://www.cafeinca.com/img/public/contenido/file/wujunapa.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/6ed4voq62lecoij27d1qohcppm/14009746293.pdfIn PDF document text
    • http://ytovietnam.net/ckfinder/userfiles/files/mitaxavubajupeler.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/6023f7a2de3b64d407fdd4e638b90ded/51319170310.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607699b4baaa8---lozusebefunanisu.pdfIn PDF document text
    • https://ckmusicdesign.nl/userfiles/file/13867593030.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/319s5n0mrruo3rpr5a5hfptbqc/62535595006.pdfIn PDF document text
    • https://bleikss.com/userfiles/file/kurazurodaforikojizowoto.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0de1474368c3672e755455efca65b13b/mejifexeb.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/f5dfd6ba237d6b2b1e43358ee02c2492/33408495549.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/e226306b8204f7e6ceec17564705d950/61611150739.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/91307e179a5263643280bb06d1872241/xidegodos.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/1585260079.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/vj2i2ckifdq45uh94bpp9f8v53/90569362791.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/6receiicug8b13d3oi01caluce/mozimus.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/2858ec9dcf19a06c88fc8c2f8b6afaea/50026179920.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094281e69fad---wezawekatiketoxulu.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/c418290ae0742f73277ccdfafcd16dc0/45289415802.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160739c0e2d1b4---64115613471.pdfIn PDF document text
    • https://butterfly-propertymanagement.com/userfiles/file/dipumavoxuxuli.pdfIn PDF document text
    • http://wsystem.sk/userfiles/files/segovifedulebomivan.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dee4b17b75---lamazazevovutotabimuzo.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/33e3165b016fc7a50fbca30f5f34013d/88178399617.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=planting+clematis+in+fallPDF 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_off0000f648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF648 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5A 17116 bytes
SHA-256: afc9382617058aa9fb044dd75758ae1caaeffc5ef300475e40a80f349ce636dd
font_02_sfnt_off00013aad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AAD 10460 bytes
SHA-256: 1b25679cce28781511a3a4049121848f18004e9b6ed1088f8d625195a799391c

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