Malicious PDF — malware analysis report

Static analysis result for SHA-256 97e9f427df512a36…

MALICIOUS

PDF

69.1 KB Created: 2021-09-25 11:45:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0406037f57cc5beace783aff4f2e87a4 SHA-1: 41f7acfb325898867c8ceece6ad26856bed4b087 SHA-256: 97e9f427df512a3619bf07b68f054106a753cac50e184665e03ce64d83484e35
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML and ClamAV as malicious, with heuristics indicating it functions as a link farm. Multiple URLs point to compromised CMS uploads and disposable hosting, suggesting an attempt to lure users to malicious sites. The presence of external URIs and link farm characteristics strongly indicates a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://fidelishospice.com/ckfinder/userfiles/files/delef.pdf In PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/d9fdaa80227ac32933fe72d2cdb58b23/nuxapovotisinixaforemas.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/g0mjlkhivv8r24f8fpp7jid3kn/nokosubovefuxiralaf.pdfIn PDF document text
    • http://wamaeassociates.com/images/uploads/originals/file/ralejobaxeza.pdfIn PDF document text
    • http://wahluenfty.com/userfiles/856109445.pdfIn PDF document text
    • http://goldartline.ua/userfiles/file/59837531732.pdfIn PDF document text
    • https://pbpkrosno.com/fckfile/44047369693.pdfIn PDF document text
    • http://wxeina.com/userfiles/files/velolowomolo.pdfIn PDF document text
    • http://phutungototuanphat.com/img-tvdl/files/gizoruwewubamujirobiwud.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/71900929618.pdfIn PDF document text
    • https://un7un9b3rl1pa7-99.com/contents/files/lonutipoxijavetafufifawe.pdfIn PDF document text
    • http://pandoraecza.com/genelresimler/file/mefutifajas.pdfIn PDF document text
    • https://navoloki.mebel18.com/uploads/files/28268111155.pdfIn PDF document text
    • https://kebecelectrique.com/upload/editor/file/76829199240.pdfIn PDF document text
    • http://vanprodukt.cz/UserFiles/File/43751545940.pdfIn PDF document text
    • http://masan315.net/board/imagefile/file/32144069485.pdfIn PDF document text
    • http://tao-oita.com/admin/upload_filesfile/fomipimifuwopidozutuw.pdfIn PDF document text
    • http://rivebistro.net/ckfinder/userfiles/files/fakedavelarotama.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/xixabiwufolefomisuw.pdfIn PDF document text
    • http://bernardthevenet.fr/ckfinder/userfiles/files/fobovebo.pdfIn PDF document text
    • http://usarsenal.it/userfiles/files/juwevavajaperetiraz.pdfIn PDF document text
    • http://kodemari.info/data/files/rakopebi.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141a02c970f6---xoterefafawibenaxakiriz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=movie+making+app+for+androidPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB012 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC824 15336 bytes
SHA-256: 804470638dfc7aca9ad265d8713de31cf73da2d3cf94d00a03a5ff00c7a589a5
font_02_sfnt_off0000ee95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE95 10680 bytes
SHA-256: 1e05486b67ba19e8da55f974a519bc7a80bfa51bb3ce382af6d75fc203ca8e64