Malicious PDF — malware analysis report

Static analysis result for SHA-256 6797916367003208…

MALICIOUS

PDF

99.4 KB Created: 2021-09-01 02:34:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3330dd2321889cd8a2c9b1026192f004 SHA-1: 1220e5d4d6652c633c761478bd4fa5e02e1b2446 SHA-256: 6797916367003208f5811f581efad45bddec1513f5cf2081b3ba6da99ee3968a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links. The document body is heavily obfuscated and unreadable, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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 http://www.alexgis.com/siteuploads/editorimg/file/zutomaduzuz.pdf In PDF document text
    • https://tumsad.org/img/editor/image/file/11840315371.pdfIn PDF document text
    • http://hylevel.net/Uploadfiles/files/33264384547.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/spj1oldfgbbmaq4j829l6rh0as/vopivobotokizupubapij.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/a48d5ad7d1777ab8b90e61ac46b610df/94759188014.pdfIn PDF document text
    • https://praktijk-fix.nl/userfiles/image/file/vewikifoligi.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e615daa0b4---14004490140.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947831c943c---56125833569.pdfIn PDF document text
    • http://fobosgrunt.ru/files/ckfinder/files/kisoxowefipubozuxasu.pdfIn PDF document text
    • http://matchonusa.com/uploads/files/99266477929.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc7b49ad9f---jisoxiniwovebuxiwox.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c600fb56203---natogapefixit.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/66511444614.pdfIn PDF document text
    • http://stolocatering.ca/clients/874514/File/xepuzozavif.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/6e8dce7d48971d9c680f911ccf747e9d/62515060439.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608cfbf09e19f---25618018917.pdfIn PDF document text
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/45567549935.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/7243541660c7b208d84c9.pdfIn PDF document text
    • http://0-50.ru/userfiles/file/dudubijafabowugo.pdfIn PDF document text
    • https://didacostruzioni.it/userfiles/file/21760213208.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/bff9082182ca7d939f180fa390adf34c/40705359742.pdfIn PDF document text
    • http://gps-ambroisie.com/ressource/site-image/files/93679180697.pdfIn PDF document text
    • https://alwillislifecenter.org/ckfinder/userfiles/files/93646726157.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=bachelor+of+social+servicesPDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000122fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122FA 10352 bytes
SHA-256: 0c1f4378481420ccfdf181ea9a9d9bfd37d80866a8b4359482d3a9f7660aa260
font_01_sfnt_off00013a81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A81 17244 bytes
SHA-256: 8fd12d0b61eca72b91c4597641db5bfab4e3c756bdaa3b88dbb83331a6505818
font_02_sfnt_off00016753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16753 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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