Malicious PDF — malware analysis report

Static analysis result for SHA-256 5144acb0ccb0bee7…

MALICIOUS

PDF

86.2 KB Created: 2021-09-04 07:04:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3e59ab7a735273163fa6326057545f7a SHA-1: 608b25a19f6b651b9e3a186f0d5b77c517d8b192 SHA-256: 5144acb0ccb0bee751e8bd258cdb3efb77a6eccfad569d699e05dc97814b63a0
156 Risk Score

Malware Insights

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

This PDF was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised or disposable hosting domains, likely to lure users to phishing or malware distribution sites. No scripts were extracted, and the document body was unreadable, but the heuristic firings strongly suggest a phishing or malware delivery scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://em-mould.com/ckfinder/userfiles/files/rozozuzidogawolux.pdf In PDF document text
    • http://mclarenquartz.in/ci/userfiles/files/67446757816.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bc1873e4831---12864662421.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c3abe79f60---rumududobaleboxeguzemumu.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ec4f6d403e---rorofoguwag.pdfIn PDF document text
    • http://inica.org/files/file///xarimogagupume.pdfIn PDF document text
    • http://safarekhoob.ir/basefile/safarekhoobir/files/bokokopofaduwigima.pdfIn PDF document text
    • http://dafangtour.com/fckeditor/userimages/file/pefotigigipojo.pdfIn PDF document text
    • http://alanurturizm.com/rsm/files/59008781481.pdfIn PDF document text
    • https://gym-rectif.fr/ckfinder/userfiles/files/dubovuxabosajedalu.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/16131132876254---jenapebew.pdfIn PDF document text
    • https://riolospettacoli.it/filesUploads/file/35057634164.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160998350b1017---6328542065.pdfIn PDF document text
    • http://debnine.net/UserFiles/File/dojamokavajatuwokatelos.pdfIn PDF document text
    • https://marathonblainville.com/userfiles/files/tuwajujimexeboxutegawul.pdfIn PDF document text
    • http://jkphotocon.org/data/userfiles/files/vekidabenuzamonevumewu.pdfIn PDF document text
    • https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/22a30405ba5a216716d519f9a2d8336f/fepilogesonexuravivowe.pdfIn PDF document text
    • https://avistravel.ro/userfiles/file/113495962.pdfIn PDF document text
    • http://matsonconstruction.net/userfiles/file/belorobobipatutaf.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/0e918cb8f6527786381226d09aa81728/xesokufesetilababuz.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608ddf7877549---64803729596.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/524bb0e8bca7dc4134069ca6ec47527d/45724593497.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611b1477419db---lezaviridirelalasegefej.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b63956ca89e---32790874416.pdfIn PDF document text
    • http://growlink.biz/userfiles/file/fojidapuzuvunafexofiwak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=musculos+de+la+espalda+anatomia+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_off0000eaf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF6 17796 bytes
SHA-256: 6fcd4ab2f94c3e9f28a111d4a5e8084c9fb3e407bab857a2d00cb862fda57ecc
font_01_sfnt_off0001185a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1185A 10772 bytes
SHA-256: 08d81eafc44a7bb759a72cad42bc227b4bc332b27cd14a0e167d35a33720cec4
font_02_sfnt_off00013125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13125 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.