Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e45fdc857d51d4c…

MALICIOUS

PDF

80.2 KB Created: 2021-08-07 06:45:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 6149c26395e119f0a9cb8c9782c17043 SHA-1: 5cc21dcdcef88026da2610f37bde81c634e3ad4e SHA-256: 9e45fdc857d51d4c6c566717b486f7ad92d15c0632963f897323285c3275639d
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, 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.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://phatnang.com/media/ftp/file/41645229049.pdf In PDF document text
    • http://www.stadion-zarya.ru/ckfinder/userfiles/files/kumegemupotoxane.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160afea423c1a1---39859563377.pdfIn PDF document text
    • http://quick-thailand.com/images/uploads/file/tupigizesagututisited.pdfIn PDF document text
    • http://chanakol.com/ckfinder/userfiles/files/31754385163.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/bjvpm4ffvd70jq2837ctges6g2/wokuwebenujofazex.pdfIn PDF document text
    • http://septumdent.com/img/userfiles/files/firovusobujanisifelew.pdfIn PDF document text
    • https://olterus.info/contents//files/bimujotasoliwizumo.pdfIn PDF document text
    • http://prattsofdouds.com/clients/d/d8/d85aab9f4bcbae69c8358f7a9990a0b1/File/53960425220.pdfIn PDF document text
    • https://noventa.cz/media/files/file/55943933780.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/52836d417a8e11c340494d7e62a5460b/rakamemefakusiduvasixub.pdfIn PDF document text
    • http://wongkungfu.ca/clients/f/f5/f5c316b966f29b3192b3e9e3c5714b3c/File/fafozinijugavu.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/89588203571.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160aae7719c6d5---xapebaredo.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/34315303bc5bf24e3a515cdb12faa6c7/37453980211.pdfIn PDF document text
    • http://sakem.org/userfiles/files/14861076628.pdfIn PDF document text
    • http://hytechplus.com/userfiles/file/56056923190.pdfIn PDF document text
    • https://szalkasszorutacskok.hu/app/webroot/files/content/files/74841386506.pdfIn PDF document text
    • http://bukhatirhomes.com/userfiles/file/31963587698.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/d6037682bd7eadb0bf89be6c71867f91/satozoxaniresatumame.pdfIn PDF document text
    • https://aynispirit.nl/userfiles/file/56235099481.pdfIn PDF document text
    • http://kleni.cz/userfiles/file/temufavuxejitelugi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=fichas+refuerzo+matematicas+6+primaria+anayaPDF 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_off0000d2dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2DD 11120 bytes
SHA-256: 4d1eb20bf59458f6a1c7158e1fab9f94c95230c9c8fa6260b6a81729d58e71bf
font_01_sfnt_off0000ecc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000104d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D5 17688 bytes
SHA-256: c4e102659771590a831ba72f39a5268a844fa1c1e12f0bda93a4d326f75707c6

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