Malicious PDF — malware analysis report

Static analysis result for SHA-256 676dd121b84132ef…

MALICIOUS

PDF

84.5 KB Created: 2021-09-05 04:53:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 05b63e12d94ca8690ce3f8207dd06988 SHA-1: c3d68973a0044cd3ba39f4e8e508f3625c3c59dc SHA-256: 676dd121b84132ef27ea69d7ef1f2d7234ec6091ef67249e0c6a0ce0d0088246
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm. The embedded URLs, such as 'https://garglob.ru/uplcv?utm_term=new+york+state+attorney+registration+form+pdf', likely serve to redirect users to phishing or malware distribution sites. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM firings reinforces the conclusion that this document is part of a phishing or social engineering campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://garglob.ru/uplcv?utm_term=new+york+state+attorney+registration+form+pdf PDF link annotation
    • http://alicekhenrylawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/6535430250.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aca2ad4015b---69524238557.pdfIn PDF document text
    • https://panificiopasticceriabattaglia.it/file/mijotanajepividet.pdfIn PDF document text
    • https://heatingboiler.ca/fck_upload/file/nunosewab.pdfIn PDF document text
    • https://bbgpiti.com/userfiles/files/66675650679.pdfIn PDF document text
    • https://observatoire-omic.org/documents/file/71139852100.pdfIn PDF document text
    • http://mylodge-naoshima.com/gibupikepurixozupowe.pdfIn PDF document text
    • https://pixel.bg/img/file/51713856647.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/1b2b83a6d7b2517d9fc1534e44392a6c/46772894268.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/64e448fbf039e5dc43bb88eb9d19f83a/kewoxusitoxezujinetonunun.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/c31b689eee91071ce15c081abe3b150d/jaxekukalawom.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1610375b03df78---wewufebuxufurowaxojonas.pdfIn PDF document text
    • http://lavalnerina.it/userfiles/file/88197000597.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/jovewosupikutorot.pdfIn PDF document text
    • http://uspeh-kursk.ru/ckfinder/userfiles/files/janutu.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/0d6d50a009edf82fbb78b9e01a61936f/25765634276.pdfIn PDF document text
    • http://bioterapiazabiegi.pl/obrazy/file/jejofasolivimexikimawomav.pdfIn PDF document text
    • https://pianotuningdarwin.com/userfiles/files/22362195978.pdfIn PDF document text
    • http://bukharaatlanta.com/sites/default/files/file/46525972780.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-8-18/20210818235749171897.pdfIn PDF document text
    • http://cmtdental.com/upload/ckimg/files/8781355406.pdfIn PDF document text
    • https://mumegram.com/userfiles/file/78529915242.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/9c1db7ce726036f0dcf979fa88f76981/luwetexewoji.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/7t6mlpqjbfbv6eq48at574gs3v/lapedofuxo.pdfIn PDF document text
    • http://cu-hinothai.com/ckfinder/userfiles/files/92549925059.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce2cc9df27---mewidekotivasuxowajokoji.pdfIn PDF document text
    • http://energo-market.ru/sadm_files/mexulenoluzapilutik.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FF 18764 bytes
SHA-256: aa1d939dbce833722cc9b7aa4e3ae3e96fad6b8f6f69ae6b55c4f96f52116c22
font_01_sfnt_off000111fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A15 11064 bytes
SHA-256: cf8c4b8c7cf89aecbdc41cdb4921acaa4844164c48dfec73e38e3594e598640b

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