Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc1eddda9509303a…

MALICIOUS

PDF

93.7 KB Created: 2021-08-02 14:00:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2200ec7368fb693a0329512dd0b3a3b7 SHA-1: bbe84ef2064eb510f234ca154015cdc758343837 SHA-256: cc1eddda9509303a189d9ecc90b38bcc57e73111a371d0f5ca7cc3d6d33de173
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate an attempt to lure users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://inwebjor.ru/uplcv?utm_term=why+is+my+dyson+pulsating+on+and+off PDF link annotation
    • http://architettoseneca.com/userfiles/files/wemawaxonulado.pdfIn PDF document text
    • http://amdind.com/userfiles/file/radigujapumunaxasosox.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb3bd6fcc9---fabopom.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094d83b188ca---14968687622.pdfIn PDF document text
    • http://taiwanglassgroup.cn/userfiles/file/82404383910.pdfIn PDF document text
    • http://cnc-soustruzeni.cz/files/file/38416561571.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f067d16704---4536910449.pdfIn PDF document text
    • http://www.ssc-ras.ru/ckfinder/userfiles/files/10370779749.pdfIn PDF document text
    • http://bluestandard.pl/ckfinder/userfiles/files/niruwunawopuzajinosaton.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a4245c7f45f---kudimirime.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/c45fafe162e788b0e757e8e865fe5121/1454755322.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/oc8r0h2bdr07o9uhqhq50h67k5/joxovadulelimodamivof.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608c8f0447049---72869084667.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160a022341366d---rulikimuvusasafuzil.pdfIn PDF document text
    • https://samowar.me/upload/file/16475441590.pdfIn PDF document text
    • http://hesexpo.com/img/editor/image/file/buvitobimed.pdfIn PDF document text
    • https://liur-krd.ru/userfiles/file/vosederidonipadus.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/fudatin.pdfIn PDF document text
    • http://ricarda-allegra.de/userfiles/file/69640821350.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/6nvmugnt7fnnpc2pfflh4pjis1/bipifadapebatibokenuwaj.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/b0e9b4d7217af40a27f0ac8729c0cb64/79519815576.pdfIn PDF document text
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/xeneguxejetetudavukag.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///38464708654.pdfIn PDF document text
    • http://csc-0898.com/userfiles/file/20210713212026_dw51z4.pdfIn PDF document text
    • https://basalyemek.com/ckfinder/userfiles/files/gutewujoravabowozipajako.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_off000109e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E3 17244 bytes
SHA-256: b174a293f5bd05384364d54d5ce3bf6c5b80254793da4c7e506a8a5bc5126208
font_01_sfnt_off000136c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014ed8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14ED8 10920 bytes
SHA-256: 52e4610fe8f0e1078a4ab42de3a9ef2f63dbbf9dd712e3698bf8c3d86ad0e120

Open this report in the interactive analyzer, or submit your own file for analysis.