Malicious PDF — malware analysis report

Static analysis result for SHA-256 0784b001db56222c…

MALICIOUS

PDF

67.9 KB Created: 2021-10-13 17:33:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: d40f222e7c7f18abe00df9d2a7d61ae7 SHA-1: 101050a70f01cb205ea4c6cf1b668b7d8a07c2b4 SHA-256: 0784b001db56222ccee343a42fbf3685cefdae0f94db331f2443bd314e86f3fa
176 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which appear to be compromised WordPress installations or disposable hosting. The 'PDF_IMAGE_LURE' heuristic indicates it's likely an image-based document with a clickable action, typical of phishing lures. Although no scripts were explicitly extracted, the presence of external links and the 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' firings strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 67 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://aranykoronakft.hu/userfiles/file/79507163421.pdf In PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/019d60fb9b779453f78da3b7f8057692/dogipekexidasidawaw.pdfIn PDF document text
    • https://granitabrasive.ro/editor_up/18026921272.pdfIn PDF document text
    • https://relaxbotanika.cz/ckfinder/userfiles/files/lekovudevaxazobalo.pdfIn PDF document text
    • https://hophamthaibinh.com/upload/files/jafenunaf.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/11738635429.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/ce24e70b097e1f2ee75eaa06a2495f44/59249490173.pdfIn PDF document text
    • https://alpasol.e-giant.net/upload/files/vedanosisowikovavexixixij.pdfIn PDF document text
    • https://allianztc.ro/files/file/negaxulopefunan.pdfIn PDF document text
    • https://wolfgang-photography.com/userfiles/files/jofaja.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/sekumopewugavikojalanime.pdfIn PDF document text
    • http://iktoktatas.hu/files/file/59234782046.pdfIn PDF document text
    • https://dangeloremodeling.com/nbloom/fckuploads/file/64665334294.pdfIn PDF document text
    • http://p-energo.ru/content/file/pawisobu.pdfIn PDF document text
    • http://traviet36.com/upload/files/temovotasajowo.pdfIn PDF document text
    • http://gestaocipa.com/public_html/Imagens/file/95343848588.pdfIn PDF document text
    • https://almuhja.ps/ckfinder/userfiles/files/14142871749.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/59ecdd1695c45e8e68febbe80afc03ec/31832647694.pdfIn PDF document text
    • http://pluimveebeurs.com/userfiles/file/zobupogosudixazonatapuru.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1615ce3ddefcc8---pevaxelexipej.pdfIn PDF document text
    • http://yavuzselimvakfi.org/resimler/site/files/43053207508.pdfIn PDF document text
    • http://cjcounsel.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vajavolitunipelefikon.pdfIn PDF document text
    • https://combrooncom.com/contents/files/75477864472.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/896FEnmJZlk/uplcv?utm_term=poly+l+lysine+coated+platesPDF 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_off0000af53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF53 10520 bytes
SHA-256: 77960804000aec3b1f15ae0be404326be92667e92b9e91bef4762ff4e8a6d082
font_01_sfnt_off0000c76d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC76D 13992 bytes
SHA-256: 5404e72c0d81978615da4050b90246de0ff41f9ed15a13d60b92d5fedd59feba
font_02_sfnt_off0000ea0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1