Malicious PDF — malware analysis report

Static analysis result for SHA-256 f14958c38ba0b81b…

MALICIOUS

PDF

79.9 KB Created: 2021-09-16 12:37:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c0c1b91a8d4c0e1b25adf2cf8fe85ac3 SHA-1: 2de39a292a5ba2df464cf588bc409e40ee747bf1 SHA-256: f14958c38ba0b81bdecab39555cf995c1cb27825fc22dbe00183d438f82861b9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://beautifulmoda.com/userfiles/files/67033606538.pdf In PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16142f9a2a6379---82154105694.pdfIn PDF document text
    • http://www.santabriganti.org/admin/ckfinder/userfiles/files/82207323077.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136baf52c3aa---73717551371.pdfIn PDF document text
    • http://akifkasaboglu.com/esatfisek/images_upload/files/40673192909.pdfIn PDF document text
    • http://thomas-zigon.de/images/file/98537891052.pdfIn PDF document text
    • https://rusepress.com/uploads/wysiwyg/files/28947533289.pdfIn PDF document text
    • http://jgweld18.com/UploadFile/file/20210910143456706.pdfIn PDF document text
    • https://jdsliquorlocker.com/nbloom/fckuploads/file/fasuvotawixokutimisixigod.pdfIn PDF document text
    • http://detaycopymatbaa.com/userfiles/file/19463592208.pdfIn PDF document text
    • http://crabandclaw.com/uploads/files/verimotokamipojibijaxi.pdfIn PDF document text
    • http://adacu.org/userfiles/file/20210911202500.pdfIn PDF document text
    • http://digifast.cz/userfiles/11057699497.pdfIn PDF document text
    • https://sofanet.ro/ckfinder/userfiles/files/sifovajisibujiwik.pdfIn PDF document text
    • http://rmgoals.com/userfiles/files/mekefumanejiwegefo.pdfIn PDF document text
    • http://irfanmakina.com/depo/sayfaresim/file/zuvimikikake.pdfIn PDF document text
    • http://loaamtran.com/files/usersfiles/files/pibexabiranekegad.pdfIn PDF document text
    • https://baoyi-chuck.com/ckfinder/userfiles/files/88347202175.pdfIn PDF document text
    • http://letnipohar.cz/upload/file/bixutevemimabinixilaxutom.pdfIn PDF document text
    • http://alfonsoguiggiarchitetto.it/userfiles/files/fudavajamususabatip.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/74891240916.pdfIn PDF document text
    • https://commonlawhouse.in/userfiles/file/49684096370.pdfIn PDF document text
    • https://osakadentalcare.com/contents/files/jijiwuk.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141c5420fb23---79818774934.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=the+silent+wife+pdf+free+downloadPDF 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_off0000d1e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F6 18464 bytes
SHA-256: d6d062dca701381530071592626c6bb224f88dda32f39aafbb93be314a1d017f
font_02_sfnt_off0001194d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1194D 10644 bytes
SHA-256: d9eb9635c3c4d40e06887d6328153248d1445d69326aaf9aa4334b779d9b3fb7

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