Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dde98e84bb4b78a…

MALICIOUS

PDF

89.6 KB Created: 2021-06-26 08:37:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: d17ca90b56117a27e498243683774c80 SHA-1: 003c80139da0bef51a67c0c3e938b242937148d4 SHA-256: 1dde98e84bb4b78a4634cc3718a39133c57e04cb0bf3c5466c258af786a70c74
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest a phishing or malware distribution intent. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://laborke.ru/uplcv?utm_term=whitefly+on+strawberries PDF link annotation
    • http://amexeuro.com/an3_Uploads/file/5213506599.pdfIn PDF document text
    • http://debden.org/userfiles/file/99805973783.pdfIn PDF document text
    • http://aurora-c.jp/files/files/90932924900.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/4h5bidkddh88p0706kjogo5vt3/59001655577.pdfIn PDF document text
    • http://konyaozgunmobilya.com/userfiles/file/pidom.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/1625bb6049ffb35bec1e44f079928adf/80357503061.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/kuzuvidaradogizijogavuxa.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/5e9fc1c50ceb79c443f3f556d1520026/nujira.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/d30b786fea2ef0fa1648bcec8da25fe0/xikepumafeki.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd417f2efd---veledowejat.pdfIn PDF document text
    • http://inspiredindianfoundation.org/uploads/pesitobitesatexawoweni.pdfIn PDF document text
    • http://nickels.design/ckfinder/userfiles/files/tidejuxufipi.pdfIn PDF document text
    • http://www.emailposte.com/pictures/10228083.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1607e19d190ccd---lenil.pdfIn PDF document text
    • http://irishheritagesociety.net/clients/7/7f/7f3653e4c5d791bf76f28d2bf9929747/File/5369730043.pdfIn PDF document text
    • http://saptpadi.com/files/file/43580297210.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/eeo6r5dfjpljmoo4os1lgston7/50123880551.pdfIn PDF document text
    • http://generaltubi.com/container/ckfiles/files/31875417491.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/c990ce5d595eb076b4403a22c066c217/najuvapuzukesiziwulijula.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/46542dbf2b1608ffe84dcda9443cf20a/tinenigutisujazedisu.pdfIn PDF document text
    • https://medtek.vn/storage/file/subefonu.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/jevuwep.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/420d96e8473c73e5076215b1b3f85600/kuxilawixeluxis.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/2e673103ba12eb5185e6c74e4df86075/43608716060.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

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_off0000fc4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001145d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1145D 17020 bytes
SHA-256: b3acae9a344be91e0883985bbc0f37c198cdc47a67887b0c6abd134379e4124f
font_02_sfnt_off000140c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140C0 10644 bytes
SHA-256: 7eab04918c9f35143720d1ddff28721632e6451b16675e04c3ab309a950d8209

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