Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ecc9db7ec93b1d1…

MALICIOUS

PDF

83.1 KB Created: 2021-07-03 16:14:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 923264e6f14fdf83109ae9a6dbeeba96 SHA-1: 91166ed5985515a3dd8546bd87a0dd52cc6d86b0 SHA-256: 0ecc9db7ec93b1d1b73d7621c29f2517f760f4ff891ee7c0633dd43361b2af15
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://zaintik.org/files/galeria/files/dokanutofu.pdf
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b6acbd2f392---27756544705.pdf
    • https://beatmuellerfoto.ch/userfiles/files/86239846670.pdf
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a1073064050---zawuwakela.pdf
    • https://easypayindia.in/userfiles/file/41472427720.pdf
    • https://travelinnsuites.com/nbloom/fckuploads/file/78135337557.pdf
    • http://happyhanool.com/ckupload/files/90790522678.pdf
    • http://bensonlandscape.com/editorData/file/rasoxakires.pdf
    • https://alteanetworks.fr/img/file/nijikefurenonalalotejal.pdf
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/e0kpljqblpue3iqmce2qb0rpu1/kaduviwedasekidikofipif.pdf
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd3fd7a69e---29209700653.pdf
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/284264da902b2a7a45fe4427b21ecffa/rilaragudas.pdf
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/16085ca5bb8615---vifamizona.pdf
    • http://nw-line.ru/generic/uploaded/59082999469.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16087e5e8a35ab---xajolivivuzirur.pdf
    • http://propellerclubsandiego.org/uploads/files/43065307658.pdf
    • https://pjkconstruction.ca/images/file/87949835731.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16070a17f0cb3b---38056005387.pdf
    • http://snnet.kr/board_pds/fckeditor/2021/06/file/lupirazovabito.pdf
    • http://clairvoyantinfotech.com/demo/images/tewidisozawaposa.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1u6sg360u61lv7lc0vknt4vqf0/16130902178.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc2d573bb15---bekudanore.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=early+morning+worship+songs+mixtape+download
    • 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_off0000e19e.bin
18272d76c2203838a5ea75a81ce279ff51819d89f9a1862c0380305773bb0385
pdf-font-stream PDF embedded font (sfnt) at offset 0xE19E 16792 bytes
font_01_sfnt_off00010d75.bin
7878080d87b2d19c32d3e37c09ab1db59f2ae8add0db4a962341420b5ba2944a
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D75 11124 bytes
font_02_sfnt_off0001271f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1271F 16792 bytes