Malicious PDF — malware analysis report

Static analysis result for SHA-256 73dddd20daef68b3…

MALICIOUS

PDF

72.7 KB Created: 2021-08-30 02:26:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: cb0093ead811033b0dbab12532a38fa5 SHA-1: 9b63c8de3602d54c84c287a4848f9b32744e3957 SHA-256: 73dddd20daef68b3283dd755a27f45d282a6fb341915d4125a508228164faf7c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links pointing to various websites, many of which appear to be compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the presence of multiple external URIs and the PDF structure suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://garglob.ru/uplcv?utm_term=2+cups+of+self+rising+flour PDF link annotation
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/feubvov8nfpm3g7a0r5q5e2qn8/63318437917.pdfIn PDF document text
    • http://cabinet-blin.fr/ressource/site-image/files/zisojekaxasopuz.pdfIn PDF document text
    • https://fminterativa.net/cms/plugins/ckfinder/userfiles/files/zarodikorokosake.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160a34ac82c35c---55909491652.pdfIn PDF document text
    • https://www.naabelectric.com/userfiles/files/95777414611.pdfIn PDF document text
    • http://englandmatchshirts.com/assets/file/88589184224.pdfIn PDF document text
    • http://champagne-marc-chauvet.com/images/files/befapipifoxiluw.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/ae3ton873h9dh6vp6a6ofuq5j0/51250445593.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/lirofazakuxorubarik.pdfIn PDF document text
    • http://rentaruedas.com/files/others/86630309766.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/3aca02de5a2708b9b0c1199fc8513b9b/bejemugozit.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/ac20ce9b45c8be49a126538e0e2798f1/gefujixezupezobabejejined.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b53f7997ae4---16103699860.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160733332c2b51---nesuvujaxalesiwoge.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/d7aaf146d9b58beb39769775f1b1b850/vodejegabosefomexifadap.pdfIn PDF document text
    • http://cngwalk.com/fckeditor/userfiles/image/5311038326.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/wurawur.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1facb4993---71805349719.pdfIn PDF document text
    • https://webshopplus.nl/app/webroot/files/userfiles/files/42543605457.pdfIn PDF document text
    • http://meyergarden.com/ckfinder/userfiles/files/dinivemamawesisimakarob.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_off0000bd32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD32 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD549 10516 bytes
SHA-256: 4e1f8ef4313bcb583720800d7bd6ac02e9b18af8ce1b89495e10d0654566b3f6
font_02_sfnt_off0000ed56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED56 15380 bytes
SHA-256: cf18f651d6844198732a1ffafa078cac789c660ab6c24fc94f0ec3f429fb9783

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