Malicious PDF — malware analysis report

Static analysis result for SHA-256 530e151d9a8780ee…

MALICIOUS

PDF

85.6 KB Created: 2021-08-11 12:47:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 11110d50970db2f39a261030f4b1c4c6 SHA-1: 10b999bec6c77be7487d71793b3960b108ceed92 SHA-256: 530e151d9a8780eee392db13c5e69138cff2556f1abdf1d3707623d940f9b2c2
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised WordPress sites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://queure.ru/uplcv?utm_term=convertir+grados+f+a+kelvin PDF link annotation
    • http://roomyab.ir/basefile/roomyabir/files/modefimesijokosajulem.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080e98d695b9---mepefusidipikufaj.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608764d3abeb7---36415114334.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ec5b41fa4---lijan.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/eca6cd195ffab5f91c4c4d005c734fdc/tupupof.pdfIn PDF document text
    • http://yalciniskele.com/imgup/file/60821500378.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160707c35cf6e9---79606697150.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/1ul69hpiluipki89nobfp1c8f2/39962756465.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e28f97b5eab---gavirodujozazewi.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/24262681257.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092c50590729---disazelokujo.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bbbf2b6b94e---togebenexikexedumajik.pdfIn PDF document text
    • http://maxidmum.com/images/upload/fck/file/zosepejanixepaf.pdfIn PDF document text
    • http://massageindex.nl/images/uploads/93228364349.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b906c54b147---dudafuxunivafiru.pdfIn PDF document text
    • http://sportsgarten.com/editorData/file/filujogakigun.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/3f7c7aa3247020ab6fe6fa8f0b3396e2/genemo.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc0647622e---60740184162.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/9lesmm827egjlmqifqn2p9t0m1/jololajefizi.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ab8e70ca434---geveletibobo.pdfIn PDF document text
    • https://aimtronu.org/userfiles/file/44105568955.pdfIn PDF document text
    • http://thegioinoithatcamranh.com/media/ftp/file/robokejetajedatobuna.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/673af71c2a09fad8161d578c4ebcb7d8/bufubisezezavevazobejar.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/9564773622bf64ce972350059b4df917/malemojulerafasagifor.pdfIn PDF document text
    • http://familiegravesen.dk/ckfinder/userfiles/files/rotexofavunemagigiwulax.pdfIn PDF document text
    • http://superfasttv.com/uploads/files/21207456670.pdfIn PDF document text
    • https://sitpchemcieszyn.pl/_sitpchem/file/lelapezedero.pdfIn PDF document text
    • http://eltonltd.ru/sites/default/files/uploads/13384575389.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FB 10716 bytes
SHA-256: 65956297285bbbcb0d2e8c5d41a097a6d97d3f091ecd1cb389f125f97ef60d26
font_01_sfnt_off00010095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10095 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000118a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118A7 18344 bytes
SHA-256: bf98bc65ef588f7666da527ffeb50947fcd2dd3841a12be232a5fbf445875cf0

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