Malicious PDF — malware analysis report

Static analysis result for SHA-256 471978ab21ff2025…

MALICIOUS

PDF

91.2 KB Created: 2021-07-25 06:13:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f1e814e042a4de491fc93d383e4da5a1 SHA-1: 0f1453ef9a28627fff8e2f6a06975f03a62c48f6 SHA-256: 471978ab21ff2025455d1be0f8c45babe6f756916e0c9eabdd00e5b4c4a9d1c5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://xlsferrosilicon.com/d/files/tutamewubujuviwar.pdf In PDF document text
    • https://nutricount.cz/UserFiles/File/sajazu.pdfIn PDF document text
    • http://dreiseengrundschule.de/files/sajebizudanowarozomab.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607feb55637ca---43615887825.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/00vhg07koo6lsk601usgk59i1d/sebakajunumobive.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1609f81cac5923---70530588191.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2f4ad88e45---66399676650.pdfIn PDF document text
    • http://arebiatours.com/uploads/files/xirobibesagij.pdfIn PDF document text
    • http://msnladyboy.com/ckfinder/userfiles/files/3274713455.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/lexirowadopib.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a1004edaf9f---93491950505.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eae8e9ec8d---sogunuranirulojura.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/sepowex.pdfIn PDF document text
    • http://murphysbeads.com/clients/54316/File/10777144766.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b1ce7fd7a---44745166595.pdfIn PDF document text
    • http://abpaluso.com/upload/file/lodesapuluxidafapibomen.pdfIn PDF document text
    • http://energy-labels.com/userfiles/file/10353970996.pdfIn PDF document text
    • http://mawaevents.com/uploads/file/31061285917.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/3823cb397feec809c1da4fc55a8eeeab/vifeme.pdfIn PDF document text
    • https://aravlicraft.com/cmsCart//upload/file/10095510522.pdfIn PDF document text
    • http://quiltingacademy.info/fckeditor/userfiles/file/xuzepesiferoniv.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae3adb729e8---zefukofunerapilusatolele.pdfIn PDF document text
    • https://fedico.ca/upload/editor/file/96863053607.pdfIn PDF document text
    • https://camgloberealtor.com/userfiles/file/97627983776.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=ejercicios+resueltos+de+funciones+trigonom%C3%A9tricas+para+secundaria+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_off0000f994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF994 18244 bytes
SHA-256: dddb057d8ffc5b14b4ef24a46685fafb85c87f16b2f37059df217cb354ce3593
font_01_sfnt_off00012808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12808 11328 bytes
SHA-256: 15ad2b4f1f3a873d75762a6350a3f97f7452b87fdd24bb03f53c5e65b71401a9
font_02_sfnt_off0001421a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1421A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1