Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ab72ee724c2b05b…

MALICIOUS

PDF

77.8 KB Created: 2021-06-29 02:58:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 05cd11afcd1a0406abe544456f3e7a65 SHA-1: 5780b4d700ee76f5db6a4e070d15eec18104f2cc SHA-256: 9ab72ee724c2b05b8a6e4806633e6d294e5f79cccc3d1b3ebcba05ad23bfb873
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics strongly indicate an attempt to deliver a malicious payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 https://drafthe.ru/uplcv?utm_term=the+langston+hughes+project
    • http://paroissedementon.fr/upload/files/mifodinedolajunen.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a15e230c72d---vasowuxoxekazuxofumoma.pdf
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607595ca08cd5---bigobaxokuxamerisavupezad.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d426c91d51---97859842099.pdf
    • https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/shjnfjnd7ft00d40hpou3pkrco/13558210034.pdf
    • http://blankheich.de/images/uploads/file/68172363269.pdf
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/affab0dbfe166fdd82d7cd97545db8ad/koperedodabomef.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4668b7c856---24560480615.pdf
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/ca170792e8de258d18c70accf813d37e/49805254990.pdf
    • https://psychologgia.pl/Upload/file/22958942124.pdf
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/c3fe439d422e8af7102624c8848e2704/binenafosedewe.pdf
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/014a8e7c641b5bdb5cfc01ba3d2c8b86/guberifogemipiji.pdf
    • http://urgentcarepb.net/userfiles/file/61560704306.pdf
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/d3267da4201e6033e06efa2d898c35f5/waket.pdf
    • http://ourjamesfamilyhistory.com/clients/1/14/146a9f92d0a296c7c29e793db058bb30/File/13393115154.pdf
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/1e184f5e1c9b8683064dcf199c55a923/91219713746.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dfedcb2c2d---digakiwosuxumobotosazoru.pdf
    • http://hccc252.ca/clients/e/e4/e484b38507f190a955b66748903449e1/File/rizazaxekufosegak.pdf
    • http://kondicionery-fryazino.ru/upload_picture/file/xajofux.pdf
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/8bf1djlg39kmu6ilgbdhnehc3h/74935654694.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3q1ovd6s5gv29pnjtvvtm2eqo3/41897893585.pdf
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b4cf96f4179---gezevadigaxasarujo.pdf
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/995h5bcq0fs7scmin6r590nn29/pogibuwedikerebajowaf.pdf
    • 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_off0000cca9.bin
5cca6dcc479bf8b68f9490687fb594ed0eb5295f5fbc33256d10f7c2348c8a68		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCA9 10752 bytes
font_01_sfnt_off0000e570.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE570 16792 bytes
font_02_sfnt_off0000fd82.bin
4c093260178702893fe163da457ba181aaf9f13a635193ddab93eec667de6a4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD82 17096 bytes

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