Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffb2eceb3273f134…

MALICIOUS

PDF

83.2 KB Created: 2021-09-24 10:35:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3f6e33039a2d3e1b84bf27f585349a4c SHA-1: 834188296142c050836916bf601ed33be20766eb SHA-256: ffb2eceb3273f134ff856ee390c823affe5a2020c0538ed306673d12e07ddafb
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, with numerous embedded URLs pointing to potentially compromised websites and file hosting services. These links are likely intended to lure users into downloading further malicious content or visiting phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16130cc86d7e6a---xunijul.pdf In PDF document text
    • https://inprovitcolombia.com/ckfinder/userfiles/files/tofowelul.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/bawowe.pdfIn PDF document text
    • https://www.rapn.ru/ckfinder/userfiles/files/10255211442.pdfIn PDF document text
    • https://callmarkinvestments.fortunekenya.com/callmark/files/30053723529.pdfIn PDF document text
    • http://wanyuantemple.tw/userfiles/file/vuwozup.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614915f9b6518---xevufixo.pdfIn PDF document text
    • http://dsacare.com/admin/uploads/file/nogurutobade.pdfIn PDF document text
    • https://sanmuabandoanhnghiep.org/images/content/files/11035673385.pdfIn PDF document text
    • https://thietbixanh.net/uploads/files/dediluvixugi.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/16133646640491---popobirudubu.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/boximuzugujisalogifex.pdfIn PDF document text
    • http://dbcasagayathottam.org/assets/uploads/cms_images/files/tijesejikugapuxaja.pdfIn PDF document text
    • http://reylab.com/userfiles/file/rujezolox.pdfIn PDF document text
    • https://prospr.fr/ckfinder/userfiles/files/10797399400.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/46a3e1f2a9b580e32fdf30ea5fc5626d/30818728576.pdfIn PDF document text
    • http://coverybox.box8websites.com/ckfinder/userfiles/files/reruluzaluxomitasosowesud.pdfIn PDF document text
    • https://monyetmesum.com/contents/files/61519538391.pdfIn PDF document text
    • https://seo-methodes.com/userfiles/file/wojefepuvekapopipinoba.pdfIn PDF document text
    • http://krasneclanky.cz/uploads/nulubeditiv.pdfIn PDF document text
    • http://dostrojar.sk/UserFiles/file/77238990256.pdfIn PDF document text
    • http://nigerseedindia.com/uploads/kajokuvovalivikag.pdfIn PDF document text
    • http://pandoraecza.com/genelresimler/file/15381291061.pdfIn PDF document text
    • http://e-instar.com/userfiles/file/65611935796.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=it+started+in+the+elevator+jamille+fumah+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_off0000da7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7D 11012 bytes
SHA-256: 3c5fa2c670e29b4920c8f1b18f9e26b933554420de8623fba047894a90f04bf6
font_01_sfnt_off0000f3cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CF 18712 bytes
SHA-256: c16a0d0023c984b1f425b4c504f03c07f23fca16e6d575078a517965e8a1ecf3
font_02_sfnt_off000124d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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