Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f32eb5f5615e19c…

MALICIOUS

PDF

91.1 KB Created: 2021-06-25 18:32:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fffaedc0155423bdecfa33bc8fac22e3 SHA-1: 252be3f90e0a4d9b112da9b2d482471079a346c5 SHA-256: 0f32eb5f5615e19c81910047c1984f4bc97b3e83f46cd291b32e6f5b2d0a1e0b
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and potentially disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via embedded links. While no scripts were directly extracted, the structure and URL analysis point towards exploitation of user trust through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/gvpmf3lrtabd67udru06bq2l7e/sesenavakobovotavig.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0608cb9e9---53860881050.pdf
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/e832edd4a00d1f3a74ca3d7483653d4c/zepexobafag.pdf
    • http://csc010.com/userfiles/file/20210612040956_wgvwyt.pdf
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/gopugubidamemiz.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072adc42e904---4067192937.pdf
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/9323481ae56127dadeec849142e29c9b/47901391929.pdf
    • https://chptravel.ir/data/file/zebomelelagepenipud.pdf
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607c280a6377c---zulopubaretip.pdf
    • https://rajatotogroup1.com/contents//files/78527564671.pdf
    • http://inlygiaylynhua.com/upload/files/butazafarotazebuvusirug.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607700d8adcd4---38116805663.pdf
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/97de22e9640f42bc232f333f9923357e/89807024809.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8bcffce026---93917854982.pdf
    • http://fujiya-la.com/uploads/files/83054464878.pdf
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/91492efb3114e9ed245060372553dd34/sitagaxatikopapi.pdf
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc26bcf5f5---33713505114.pdf
    • http://lacasedescaraibes.fr/file/gabapawad.pdf
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/5f9d51bde51d2a224420c794946d0df0/vujakozumaxero.pdf
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/770c004d87d4911a2b1019fe5360b8da/16538426772.pdf
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/fe2dc48d876a79315cbd1b842ee65e16/bokabinisofotugiwesemeki.pdf
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/vfja5u3ndv6m558eo0a1758agf/46356329546.pdf
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/kd2suivnhqt6v4k8en9kdcfum7/mogisejokolulurigi.pdf
    • http://jonmechina.com/ckupload/files/tawukufofov.pdf
    • https://asiquim.com/ckfinder/userfiles/files/xexudomedogor.pdf
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/2c78f8cd9574db938ad6c406357585a6/jelizixup.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=sister+and+brother+family+therapy
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001002a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1002A 16792 bytes
font_01_sfnt_off00011841.bin
a126fd011a43dcde4ec7d66d5d638a83d1225914185ab83d69cca5e91bccbd1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11841 11092 bytes
font_02_sfnt_off000131a9.bin
1929d8395898d3b01d5ddf70b54235936172ce0be5f15af867628db15177d3dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x131A9 16764 bytes

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