Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd1747ed29355c02…

MALICIOUS

PDF

81.3 KB Created: 2021-09-08 10:55:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f96afde3d11145991183ae8fd0b61a06 SHA-1: 798719f646c8cf9e0a64315312ffcfb3f0b0f8e9 SHA-256: fd1747ed29355c027bf96acae23114da306d67654fd691b827fde84a8135e5c3
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links pointing to external websites, many of which are hosted on compromised or disposable domains, suggesting a phishing or malware distribution scheme. The presence of multiple PDF link farm heuristics indicates an attempt to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://gymostrov.org/gymostrov/userfiles/file/50112875896.pdf In PDF document text
    • http://jagodkaprzedszkole.pl/userfiles/file/selud.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/xuvaluvixobegubutijuvis.pdfIn PDF document text
    • http://colescastle.com/clients/875019/File/34845119485.pdfIn PDF document text
    • http://bluecreator.biz/ckfinder/userfiles/files/60613148579.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/stm3ovh38n15qro3rmpn070a92/muduzatuxekiguraresov.pdfIn PDF document text
    • http://thepnguyentran.vn/media/ftp/file/ximumuwezifopifimepaj.pdfIn PDF document text
    • http://www.ks-zahnarztpraxis.de/upload/files/31470505256.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/26bd1636e87a0e6f404598937dd18b38/zifafunomoxila.pdfIn PDF document text
    • http://jakpaisanestate.com/images/upload/files/90941134795.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/b2e074403d7aa2655271dd4869db0cb8.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/80t88qn2mmi6loc6bc79oji8cb/10968708059.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f4a08009e---24928075336.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210504200640.pdfIn PDF document text
    • http://goodtraefarm.com/ckupload/files/10119689260.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/1544124596611663f50c4e6.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/q4nulebm10qg34jkvfn8cqspnt/wasijizugonumopuzi.pdfIn PDF document text
    • http://manavpublicschool.org/manav/userfiles/file/74322562573.pdfIn PDF document text
    • http://sumosushingrill.com/uploads/files/maparumupavuvuzagogex.pdfIn PDF document text
    • http://robinsonfamilyreunion2021.com/clients/7/77/7769cd5c98d63cfb9738ae2db1c5c42c/File/lapurasusefetufevelurav.pdfIn PDF document text
    • http://flexa.cz/docs/file/38104702759.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a494c0f9d2---vitasomexurim.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f273904d27---fitogena.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/tebumuxapofojadaki.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099e159c6af5---dafitevuzukapedu.pdfIn PDF document text
    • http://web68s.com/upload/files/xodupatijasiwomu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=hybridization+pdf+notesPDF 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_off0000db71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB71 16700 bytes
SHA-256: 18f5c84805df601cd20604c3adce785b7a4314f46fa4e11b6e27700833b6f21e
font_01_sfnt_off00010693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10693 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011eaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EAA 10748 bytes
SHA-256: 1d742058ee0bffcb22cc487e783fe12394480ea1ff8921efb327b635d25b07d2

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