Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e67fa6e97b7466d…

MALICIOUS

PDF

84.9 KB Created: 2021-07-03 10:21:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 76d15dd104ce1ed3ad72f84ae6a4c0ea SHA-1: c43f921cc8f49df8f14cb2c2c7e70e07bb7f9be6 SHA-256: 9e67fa6e97b7466d6e0744e174f66942f3258a5a8cdacc3865d25da445df049e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The file contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://nomylo.ru/uplcv?utm_term=comes+from+judah
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607aebec883f1---75606095346.pdf
    • https://b2b-intelligence.it/uploads/file/fozubisujikoxunuxixufe.pdf
    • http://lasfyy.com/uploadfile/file/20210620135346011.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160898a08921d8---tovixomelux.pdf
    • http://wksx.top/images/userfiles/file/21999052677.pdf
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a831a79cffa---41610366430.pdf
    • https://signika.pl/Upload/file/27771346959.pdf
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/29f1g8p9rhmcs9tup86m0h1ii0/47586685804.pdf
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/4acf170f38cca4ec8d05946471564890/wefipin.pdf
    • http://stepasidemedical.com/images/uploads/file/puvikiderok.pdf
    • http://yournamebadges.com/withyourdog/cms_uploads/file/72328798387.pdf
    • http://clarklawtexas.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/20396680275.pdf
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/557383d02374bc9473b9c806c316f73c/4763179292.pdf
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095eb881c8ca---zebezitazimomise.pdf
    • http://shinex-auto.com/userfiles/file/govonujalikajovixixevin.pdf
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/276dee3644a848e30cd29c9c6552aa36/12417731210.pdf
    • https://rubyyadav.com/nbloom/fckuploads/file/noruxuzipipiwuxapalex.pdf
    • http://ventilatoryzlin.cz/images/file/95051619770.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/oqf4adsfegje0bquq5cjselfs0/saruxosixojazojafusilivuj.pdf
    • http://abwmountvernon.com/uploads/files/99346908352.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608182782c2aa---41410448996.pdf
    • http://hondasushi.com/uploads/files/kanegosiwupoxakiwezulur.pdf
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/5743f46bec60de10b570447dcd833e3a/61895892203.pdf
    • http://www.tobywells.org/media/fckdir/file/67040419983.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_off0000eb39.bin
b18b45de6cbb9dd156a545d9c810c44de94f702490bfce63d5f3e6f97665d1a6
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB39 17216 bytes
font_01_sfnt_off00011770.bin
b47801d8d4abcf88f1f165839209b67636f475cf4e7c56f788789b03c97d09a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x11770 10540 bytes
font_02_sfnt_off00012f7f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F7F 16792 bytes