Malicious PDF — malware analysis report

Static analysis result for SHA-256 34b08e2b4319b2c4…

MALICIOUS

PDF

84.9 KB Created: 2021-07-06 20:26:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 73b6dd7ab87e19cc8d2074d88b83732a SHA-1: 4ac012826ceca549d13aa3ab2c724ad3ef77c690 SHA-256: 34b08e2b4319b2c4bfac0b92ef8b15025cc57b5237fb4c114958cee6591f5254
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm directing users to multiple external URLs, many of which are hosted on compromised websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL structure and heuristic firings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://fratellilongoni.com/userfiles/files/nupurazedewigasezotoxinez.pdf In PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/9eedc90b82a4a17fc463ccd03482f317/1979004661.pdfIn PDF document text
    • https://ivanamihic.com//files/datufeba.pdfIn PDF document text
    • http://linhkienhunganh.vn/luutru/files/75668685679.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/7c51b9b65529c6d3880c4903e6ea1366/33821281953.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076a94bd9969---61194757916.pdfIn PDF document text
    • http://arch-teh.com/pic/userfile/48020196709.pdfIn PDF document text
    • http://sllight.ru/design/img/upload/file/51944740578.pdfIn PDF document text
    • http://guilfordvikingsclassof81.com/clients/4/47/479b0a304b4cdce99dfe3eda73a59016/File/97292907629.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea3821ca1b---zunajekad.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/67aff1fd2587d8aff5ae44f2acdb61ea/vozapo.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6123a449f---53433963358.pdfIn PDF document text
    • https://sitpchemcieszyn.pl/_sitpchem/file/81809389639.pdfIn PDF document text
    • http://davisfolk.net/clients/1/1f/1f1070e31f35868a9a13f38ee7dc887f/File/58357519159.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/jg34n91ji6pbknr6a11t7q0du5/puxofobe.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e41bf821ed5---42840778793.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/3e197872617fb1d6e062ce762812f392/77474667571.pdfIn PDF document text
    • http://sneedfamilyct.com/clients/44919/File/gozoziwatozujanepevala.pdfIn PDF document text
    • http://briarcliff70.com/clients/874901/File/vuguxijisepizupov.pdfIn PDF document text
    • https://deepex.hu/hirek/files/37935963752.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5d751eaa9---detafexeketanomiminab.pdfIn PDF document text
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/rtljq1dkkbmsi4svn5nm8aiq66/23475915278.pdfIn PDF document text
    • https://delcinfo.ru/img/files/files/sowaremewubariwunu.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e29c7b58381---87544182945.pdfIn PDF document text
    • http://xn--80aamdqpfpr.xn--p1ai/upload_picture/wipopeguka.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/2707978301.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=list+of+serious+crimesPDF 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_off0000e998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE998 10240 bytes
SHA-256: 0c75a81838adf6f140c0d63b94c27e78b4ca560e352a2b0846622c3f7e81c23f
font_01_sfnt_off000100b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B1 17316 bytes
SHA-256: e7bccb86592633fa3a87119fd7f127ece382e456eb05552dccd794e082150d63
font_02_sfnt_off00012e5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E5A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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