Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c883f1c9d22d35c…

MALICIOUS

PDF

68.7 KB Created: 2021-09-06 08:11:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0e64cba127cc7d117140fc27aeafb215 SHA-1: 58ad8a43b80f1f99b16c1b4c8ce854d3c3ce19a7 SHA-256: 7c883f1c9d22d35c970b8a830b9d6396ccb50fbf4ddd5a0a4950a33af73a69c4
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file exhibits characteristics of a phishing lure, including a screenshot-like appearance and numerous embedded links pointing to potentially compromised websites. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to malicious content, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a58e2989f04---46839290491.pdf In PDF document text
    • http://wasserburg.pl/userfiles/file/41358469249.pdfIn PDF document text
    • http://savvyais.com/userfiles/file/dadolubufeximoji.pdfIn PDF document text
    • http://fluorescent-training.com/file/sipabitutez.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/cf74c702d1c5030f7638329037ebf1b8/7695871996.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160a3501bb51a1---81681822614.pdfIn PDF document text
    • https://cafemocion.com/userfiles/file/mezepizafeborukodop.pdfIn PDF document text
    • http://www.salpasafarit.fi/tiedostot/files/18061876442.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a2473541aec---2504518147.pdfIn PDF document text
    • https://cakesandcupcakes.net/userfiles/files/73088947704.pdfIn PDF document text
    • https://funcarele.com/ckfinder/userfiles/files/bujalujux.pdfIn PDF document text
    • http://jullien38.com/ressource/site-image/files/69149748712.pdfIn PDF document text
    • http://innersolutions-uk.com/file/sevaxevelawarutapit.pdfIn PDF document text
    • http://allycatering.com/userfiles/virobimopiparunix.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609243c25fba3---4398325961.pdfIn PDF document text
    • https://palezieux.com/ckfinder/userfiles/files/66866169717.pdfIn PDF document text
    • http://webatnet.de/ckfinder/userfiles/files/34513835.pdfIn PDF document text
    • http://emanuelmlevin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/5347116083.pdfIn PDF document text
    • http://s-privod.ru/userfiles/file/pupuxugedovabed.pdfIn PDF document text
    • http://klefmarken.se/upload/file/51709954696.pdfIn PDF document text
    • http://taiwangallant.com/uploads//files/202108120058104174.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fcc4312549---80273943229.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160948acaaf616---nipekozakararozizadup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=hemosiderin+adalah+pdfPDF 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_off0000b2f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2F5 10656 bytes
SHA-256: 9cfd84375f5f4fa266cfe3702ba7b3f2d9ab0883f75e66c63a4d24e5a555ff9b
font_01_sfnt_off0000cb02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB02 13908 bytes
SHA-256: 1422ef14fb12d03ee6332cd683f727df6c09c227b484dfc3a5b58774fbeab578
font_02_sfnt_off0000ece7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1