Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cac37662ccf2796…

MALICIOUS

PDF

89.2 KB Created: 2021-07-07 01:30:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 074ae614d6d7a8ba37dbb8c2db57cf3e SHA-1: e4b00a8fe0dbbef50461ab72dc9a692304516471 SHA-256: 5cac37662ccf279626d5c60a5a4b215b45e1c1bad368e251bab2b9b55ecf6797
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites, suggesting it acts as a lure to direct users to potentially harmful content. The presence of multiple distinct hosts and link farms indicates a broad distribution strategy, likely for phishing or malware delivery.

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://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/6qi8puti3e83krrq9rp4fb9kf1/19462667321.pdf In PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080706e2cc2b---guxulusinuv.pdfIn PDF document text
    • https://istocdukkan.com/userfiles/files/86329061080.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160962349b5069---pajebode.pdfIn PDF document text
    • https://puppometalli.eu/file/pobefiboburilojix.pdfIn PDF document text
    • https://666666.vn/upload/fck/file/bukakewikejalolezuwivifuz.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16091d89377ec5---varodusasepalofej.pdfIn PDF document text
    • http://boeschfamilytravels.com/clients/43210/File/84507473437.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/83da0304e94925a9d2ad536a589e6019/bonuvubijedigudivemirufew.pdfIn PDF document text
    • http://imssp.by/data/images/fxeditor/file/daluvigodi.pdfIn PDF document text
    • http://nkmate.com/FileData/ckfinder/files/20210706_96C93B77B2F11F9C.pdfIn PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/99435aefcc3c912481fb1107a0f58161/82101824422.pdfIn PDF document text
    • https://hansenlight.com/UploadFile/files/xalesaduvegagikitonutoz.pdfIn PDF document text
    • http://avision-italia.com/userfiles/files/gixile.pdfIn PDF document text
    • http://mldinsaat.com/image/files/fisozizabetiwapubedaret.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/irjfplpi22jkonblgu6titea46/noxemanakupubupogabitexuv.pdfIn PDF document text
    • http://traktorpulling.de/ablage/userfiles/files/namizorawetiwanukidatulol.pdfIn PDF document text
    • http://huntland.hu/upload/file/74307856399.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/23bj98sd1m0a9mn99pp7v5d94o/78227816119.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/tsob2l9kv5d7u402k2sfoud346/vapijefa.pdfIn PDF document text
    • http://showpalmedical.com/userfiles/pewibewatamudux.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b79f72dd078---96726543417.pdfIn PDF document text
    • https://doxity.ro/ckfinder/userfiles/files/15218974575.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/qpdjvru7m1h31121s9fg24irt9/mopewotosig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=knowledge+base+articlePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD5 17036 bytes
SHA-256: 8290d081914d5acf98d1711171dfe504c07085ecdd26d13d76e8d44d522f09de
font_01_sfnt_off00012718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12718 10760 bytes
SHA-256: 9e48211001de1a126751e81ecb034bd574a21ba1c7acd57d161a03828650c167
font_02_sfnt_off00013fda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FDA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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