Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddd75ef0835ed1ee…

MALICIOUS

PDF

74.5 KB Created: 2021-09-02 00:56:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: bc680116e85dfaee8e64207417a0fb9f SHA-1: 49e6a0f3f88285925c43c6425a871f54dd70ccd0 SHA-256: ddd75ef0835ed1eed9199f8479071b57fc0193cf6f7993e07bdb2893d64ba521
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by a machine learning classifier and ClamAV, detecting it as Pdf.Phishing.Trojan. The file functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised CMS upload directories. While no scripts were explicitly extracted, the nature of the link farm suggests an intent to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/mfftk1a6v2ei0nr25eild1ups7/kileruboxilazon.pdf In PDF document text
    • http://humanitool.ru/userfiles/file/57809649576.pdfIn PDF document text
    • http://efuegypt.org/userfiles/file/wixadojilujotiximerixuf.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/libozutisexagizevir.pdfIn PDF document text
    • http://vaynhe.com/upload/files/dapasowurubimotasonu.pdfIn PDF document text
    • https://betalinktech.com/blmedia/file/xizememowuwajikotodafaki.pdfIn PDF document text
    • http://ty-universe.com/image/files/20210613_235456.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095c60eada27---xanurilorutakabukuz.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/dusod.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160790c62e52fd---75878905606.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160864f2286510---42069533292.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/3u0q1eg1mc46sms0sq8e1acpl0/47345767242.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/nelaso.pdfIn PDF document text
    • http://fantalife.nl/userfiles/file/zebogojipaganuzoj.pdfIn PDF document text
    • http://hoadondientu-ptp.vn/images/ckeditor/files/dizosobusisame.pdfIn PDF document text
    • http://weforyou.it/userfiles/files/60501216888.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f24fa0e065---jopudegomidarisitaru.pdfIn PDF document text
    • http://roycraft.ca/userfiles/file/fufoxote.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.com/ckfinder/userfiles/files/muwujepokosi.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/161013f31f386e---fupatosebedek.pdfIn PDF document text
    • http://nage-z.com/ckfinder/userfiles/files/savol.pdfIn PDF document text
    • http://sooam.com/files/fckeditor/file/371350430610de343424ff.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/pvtlrtevm85pf3eqm39hmbf1s5/82847139735.pdfIn PDF document text
    • https://soechi.com/userfiles/file/rofale.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/gde71rqt97kgl1kjg03rfh76t9/fejakozubegude.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=midpoint+theorem+examplesPDF 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_off0000c3b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3B6 15572 bytes
SHA-256: 02d070020da6125bf39b8277080d7425c5931fb60e0596029d4751142a204aa4
font_01_sfnt_off0000eabc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABC 10752 bytes
SHA-256: 16b19bce711fe1a25207808789c2858b5f5a6f72259781accefde25362098ce3
font_02_sfnt_off00010343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10343 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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