Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ba1e28f8231a3e3…

MALICIOUS

PDF

91.3 KB Created: 2021-07-05 02:10:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2cc098ffedd45ec7db1b41c988b9a9bc SHA-1: 7cc121d9585b032db36d7bec50e60a0bc7a7e318 SHA-256: 0ba1e28f8231a3e3b741a3fc84481c52b8c4397b86766d2368cab2a86d2de1f6
176 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, with multiple heuristics indicating it functions as a link farm. Several URLs point to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of numerous links, including one pointing to a raw IP address, reinforces the attack pattern of luring users to external, potentially harmful, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1d6c70df4---nerunedexogop.pdf
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/d62e28bc707730ec2d7ed5dea743176f/povatasofidemip.pdf
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/d01b216aeb425e565f9deb304296df38/3050685393.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4d0b5dfdd---78714475941.pdf
    • http://cyuanmei.com/userfiles/file/buferokejixijo.pdf
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/up4j3qhvgvl918gibmool8jooq/vujipitadijewibemajob.pdf
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b862d7029d3---86053691180.pdf
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160e13c30b885a---gekevomakenokutaburivibem.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090ca08960ac---37363274133.pdf
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a1127bc8c---16133203298.pdf
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/8da09517b126327f325c5a535016bc31/vudoxojopofu.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f379ae2492---nugobok.pdf
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/a72f956ec4c3180930c825c1edbb4b1b/3013965820.pdf
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/8235b9a27206f08bb59cc42c93b93a83/81584509267.pdf
    • http://detikakdeti.ru/img/file/finadux.pdf
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/519672a037922f440fd0383a012a4b3d/98929445215.pdf
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/4n95rsc7e5u0jmgbssdruvse20/pafusava.pdf
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e2f4b1875b---barazijizeg.pdf
    • http://womenshealthcarenp.com/clients/2/29/29a32d4da59f0b4eaa4573e1354aeabc/File/zeluj.pdf
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/c0ead04fa3b84c2aac53bd34b282c89d/simenos.pdf
    • http://takeacode.net/user/d41d8cd98f00b204e9800998ecf8427e/file/dobifefidoviwinofuz.pdf
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/d40ff02a6c4c1e6f4fa89a4b589525da/44789857233.pdf
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/69f3af7254f9e8103b66278f0f081a19/63793748131.pdf
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/9ab57be3436a3620941fee0258e1284f/lavugenigarojuti.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=pretty+woman+watch+online+with+english+subtitles
    • 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_off0000fc41.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC41 16792 bytes
font_01_sfnt_off00011458.bin
468dde72f8abdcb4add481ab517ffad5cbf9e82ad1906a54c51f71f3cf60c5d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x11458 11120 bytes
font_02_sfnt_off00012e2e.bin
63a8bab9fd02b9d41a2b8446123165e39c13a571d92592875dcd1f3e0175f383
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E2E 17964 bytes