Malicious PDF — malware analysis report

Static analysis result for SHA-256 30b457317503efe0…

MALICIOUS

PDF

90.1 KB Created: 2021-08-19 23:37:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: baa1df25f2f28fce2bf9232d3f11e8c5 SHA-1: 44f7ed7fc3ba49ef6260c25150c7f55905a366d2 SHA-256: 30b457317503efe0d8085205caf67d86c48378aff003674ee9d6b52843b64848
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malware distribution or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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 https://laborke.ru/uplcv?utm_term=rayleigh+jeans+law+derivation+pdf PDF link annotation
    • http://biomassasia.net/data_ed/userfiles/file/66370840118.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c5de4ae9111---65441754504.pdfIn PDF document text
    • http://rakkhunnursinghome.com/user_img/files/pikalatera.pdfIn PDF document text
    • https://gbagencement.fr/uploads/file/79013399075.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609224ef93b52---kotimabesas.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/51d786a0753e1867d7a59b2ac7a589a8/raresavit.pdfIn PDF document text
    • http://spc1991.com/ckfinder/userfiles/files/bevuxew.pdfIn PDF document text
    • http://leebyunghun.kr/new/upload/board/files/56772340881.pdfIn PDF document text
    • http://dagmare.de/userfiles/file/kaxirise.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160bd3f19df062---11357199634.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/53115175195.pdfIn PDF document text
    • http://atomleasing.ru/media/File/winodemi.pdfIn PDF document text
    • http://elisa5888.com/shopadmin/upload/files/90626871965.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/fiwobilokize.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/pulatetaxe.pdfIn PDF document text
    • https://nestaerospace.com/uploads/file/49762698755.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607088aee7637---jipokowawufi.pdfIn PDF document text
    • http://thetsaban3watnuea.com/UserFiles/file/xewenofilusaj.pdfIn PDF document text
    • http://seidels-mineralienwelt.de/images/uploaded/file/70003618.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d34bf37051b16318a4436d7c867ac994/jolesibanufepogego.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/gd52p5qph4mt9ifecgto54uv3u/30946164451.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/fesomanebanizez.pdfIn PDF document text
    • https://gretajensen.com/ckfinder/userfiles/files/govodizojakigegexizepepa.pdfIn PDF document text
    • http://ghibms.com/userfiles/files/64675626074.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFE 16696 bytes
SHA-256: 9717bc140c393a407fcbbe103101a8e2924ae9ab45ccbb394afcc32eaa11eaf3
font_01_sfnt_off0000f4d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D2 11216 bytes
SHA-256: 400d7e8fde600500608392e5556a20d43127203f1c4f90f6938547488684e096
font_02_sfnt_off00010ede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EDE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000126f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126F0 19868 bytes
SHA-256: 871e5638fe0613e6873d752b824af4a63c9a60d6a5ee9f3f109448158c6f3a64

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