Malicious PDF — malware analysis report

Static analysis result for SHA-256 69539b438b06ba14…

MALICIOUS

PDF

89.6 KB Created: 2021-06-26 00:04:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 876fe22c5d61414155fb97d862d35d71 SHA-1: e3c0ca4e7be58d24507e9ac342edee11f871901c SHA-256: 69539b438b06ba14234a5f8969c828f366ada0b9428f6694520d217d6dc25f8d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress upload directories and disposable domains. The document body was unreadable, but the presence of numerous external links suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://maisonforville.be/documents/file/jazerodovovegi.pdf
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/32cvrndrq3i1tt58uk2a5lg2b6/28093705170.pdf
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/u1aumjp86pcgjg4548tqf39sst/fasewojetififebusiwu.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/0ec7d5d8f8ca01b8428b5eeb3c704189/towadakopomirujakumut.pdf
    • http://eia-edu.com/userfiles/file/90618227372.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd226d635c---6208310754.pdf
    • http://apexibd.com/uploads/fck_uploads/file/xadudupovaxijovejekemix.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/f0bcdk7pq38ndi4kcc3hq4vq75/55819756485.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/t0dek9q9qggkid21s8m7deke7l/99208156506.pdf
    • https://premium-house.uz/images/file/16475765213.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/40167d3725e97914d6a0c7ec61a9404c/keritajulazidefevow.pdf
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1607b19ba8bcf3---vobipudajimuneforolepun.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/ed70f6efd936b93a58fe868e9d10025e/13379175269.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608118c753d0c---13856016690.pdf
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/0cb892b53293ddc9a0d368aac2c0ae43/gadafun.pdf
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160bc030c7544a---bixugigirofamobifam.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/34mro7tt5astkomb239go8rkv3/51945544206.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/t76vpedatk0b46mojp33r9j6f2/vexivakifa.pdf
    • https://mmagame.com/userfiles/file/notarowijofufukama.pdf
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d4feb275e---66449943805.pdf
    • https://kp-bs.ru/upload/files/rineleputamomugebav.pdf
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089c8a81cbd2---99857346229.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af5956bd3c3---kigonar.pdf
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/5122611008.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=difference+between+an+aim+and+objective
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc2e.bin
c66274c03775670d00a22ef659234a5fcb73f9397a513634942faaf13f20aba9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2E 16888 bytes
font_01_sfnt_off000127dc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127DC 16792 bytes
font_02_sfnt_off00013ff3.bin
2e58f750f2251d9e421c2e3c6bfe68ae19db301776b9830fe2a679b68124a822		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13FF3 10848 bytes

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