Malicious PDF — malware analysis report

Static analysis result for SHA-256 44f717cc8d00a8e7…

MALICIOUS

PDF

86.6 KB Created: 2021-09-04 21:46:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5967fd906763eb9a64099e616c7484f6 SHA-1: 95e5efdda1e74d9fd733112acf764d1f9003333e SHA-256: 44f717cc8d00a8e798ae793598389aa39861b0d7ac412eb11c8aedb5b1c904f1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The numerous embedded URLs point to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and URL patterns are commonly associated with malicious documents designed to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://allytemp.ru/uplcv?utm_term=testing+business+ideas+alexander+osterwalder+pdf PDF link annotation
    • http://dangkykinhdoanhkiengiang.com/upload/ck/files/kotigedaribikikiwoma.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bf42999e603---jexonofisanupigokameroj.pdfIn PDF document text
    • https://dailyiat.com/html_upload/file/musopavamovuvit.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2c1d6911c---dafokuretuvuvemanuxowodo.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1faa60d5aa---xekataxumaf.pdfIn PDF document text
    • http://sanruou.com/app/webroot/uploads/files/75860389984.pdfIn PDF document text
    • http://varanini.pl/userfiles/file/jozutinemezosugogog.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/ef5664455d7d3a499e576e9fe11ca9f6/32671483412.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/202192858375154.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec3f3fe1925---gumitafosetebogabumaze.pdfIn PDF document text
    • http://jiin-torng.com/uploadfiles/20210727135022.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/c443a334769584cf6dfd127a6e5e7336/18949728820.pdfIn PDF document text
    • https://stmarys-perthamboy.com/upload/File/kezutamawunudoja.pdfIn PDF document text
    • https://kristinanamaste.eu/files/97155616739.pdfIn PDF document text
    • http://www.vnv.nu/admin/library/ckfinder/userfiles/files/gukirawojizuk.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/27843887801.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611816a25d1d2---suxivanatewoso.pdfIn PDF document text
    • http://zonwering-nederland.nl/ckfinder/userfiles/files/36071070119.pdfIn PDF document text
    • https://bocion.com/ckfinder/userfiles/files/42697707390.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca8ca9b6688---mekixijulovu.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160820df60c30d---4979349391.pdfIn PDF document text
    • http://chretkinia.pl/userfiles/file/mipolesitulatek.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_off0000ed2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10541 17548 bytes
SHA-256: 3092eff15ac8a5e3ca998cf3515a5708db9eb69b105c7072b854b3c988ba4576
font_02_sfnt_off00013290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13290 11064 bytes
SHA-256: 03f6f0ee2c906a54f8f4f76f31322b65681fdaafc8c2c1a2ded55901c6d68209

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