Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d7bbbc2634deaf5…

MALICIOUS

PDF

69.2 KB Created: 2021-09-29 13:49:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: c06a95792ee0a2aa92ac2ec3f1397e60 SHA-1: b2ef100f9f92630d5dd3ac1b0a54bf0bf172a6c1 SHA-256: 1d7bbbc2634deaf5e69191d80aa3a8c171483392c725d346d0f402a0f7506388
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ClamAV and an ML classifier. Heuristics indicate it's an image-only document designed as a lure, containing numerous links to external websites, many hosted on compromised CMS platforms. The primary attack pattern involves directing users to potentially malicious URLs, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://pixomot.ru/uplcv?utm_term=airdroid+cast+web PDF link annotation
    • https://4of100churchstreet.com/assets/media/files/kenutiwubodamulol.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613df3a9b3b97---bemugisirurifama.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/52608702499.pdfIn PDF document text
    • http://skipjackpoke.com/ckfinder/userfiles/files/30591833395.pdfIn PDF document text
    • https://medosojewellery.com/userfiles/files/83512575815.pdfIn PDF document text
    • http://thanglong.vn-greenenergy.com/ckfinder/userfiles/files/fifozubozezerajukira.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/e52d444576db2c94beede6466716dfbd/jagasajamenodaw.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/25779166109.pdfIn PDF document text
    • https://truckforceone.com/upload/editor/file/87777810082.pdfIn PDF document text
    • http://dfwsedan.com/nbloom/fckuploads/file/kuxamajufulonuzejawanobu.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/terojabutibamef.pdfIn PDF document text
    • http://carsonpokebar.com/uploads/files/69183803470.pdfIn PDF document text
    • http://branpc.in/ckfinder/userfiles/files/denaxelugowixowo.pdfIn PDF document text
    • http://eros-arena.name/eros/userfiles/file/murokibapumopajorimavamo.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131a5ff39125---guxunaw.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/sazegebaka.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16133c1d983ac1---66997300465.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/b9a0786b726097b9b40e5e0c1ad412b3/26691279369.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/gezefekomakofabokuzon.pdfIn PDF document text
    • http://naturenhuman.com/app/webroot/userfiles/file/muxixeduxagadut.pdfIn PDF document text
    • http://hydrem.ru/images/file/36194146769.pdfIn PDF document text
    • http://samocvet.org/foto/ck/files/3563826347.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/ubk2df01quo1al3qsadbuqf9kk/novorududoxetekitaj.pdfIn PDF document text
    • http://www.iuoelocal870.com/kaizen/ckfinder/userfiles/files/nawuxonolikenasetog.pdfIn PDF document text
    • http://cn-biyoute.com/d/files/zedojefuxedunejop.pdfIn PDF document text
    • https://www.gurkhasfinance.com.np/ckfinder/userfiles/files/vuminodikimexajiwagonibi.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_off0000b2a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2A4 10420 bytes
SHA-256: d27238d429a17771b7c9bd9ae1b499586dd7b74d51963b71afa1d534ee5d0e53
font_01_sfnt_off0000ca7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA7C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e28e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28E 14300 bytes
SHA-256: bfa9501b645b130666df204110fd912967d92c0cb798f8979d198111fc0e8162

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