Malicious PDF — malware analysis report

Static analysis result for SHA-256 319d3fb77ad76084…

MALICIOUS

PDF

83.5 KB Created: 2021-06-25 22:41:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b6162cfe2e0b4e673cc902bdbf657719 SHA-1: 91de02616afad5c14a8a8304fa384737474cfbf0 SHA-256: 319d3fb77ad760840e0eef3c89d25c23942dd319d9bff0b2b5a329f151efe1b7
156 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs are likely part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160860b4c1e2d9---manotutebozaxuwonoto.pdf
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/efeef90df4b631f08affa11df4e956f3/27900173232.pdf
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160737d2dbd5b4---25063733014.pdf
    • http://lohsclassof70.com/clients/3/31/31ca850ff086a58b81c8700e10a01852/File/wasamuwajazepino.pdf
    • http://mppscstudy.com/admin/usercontent/file/3958842082.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/2fe79173cd322a4c92662ad83a32b3a0/82887874018.pdf
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/59976af72add0ed5b31ee0d2a8ee0234/25124990020.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160884657d05d7---vufopixifodokuxejawaz.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/88a0a3132691d009ce9944d4f00c6ccb/nukunekejifokubewinura.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d1e3ead3d---35515284872.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af1c3e055d---98439049704.pdf
    • http://ecohort.com/userfiles/files/tasalaxuselutuzimiromujo.pdf
    • https://jordanadams.com/ckfinder/userfiles/files/tivujurotadajovovup.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/53e2f1fda86fb16e9464fd3525db442a/2650569405.pdf
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606d061004a9a---34140354690.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16085f3d4a3f11---32979175314.pdf
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce010286b5---zijurepaxujok.pdf
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160afff3cb6d0f---21035071047.pdf
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b6506f230---rozuloxexunumas.pdf
    • http://springhs1988.com/clients/a/a7/a70db2535ed58991dd9724faf9b165d0/File/10409756362.pdf
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608b267269115---61827684946.pdf
    • http://odpadykj.cz/UserFiles/File/vamowupifixozupipezi.pdf
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a2cad58aa2e---63191946349.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=transfer+function+of+armature+controlled+dc+motor
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e742.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE742 16792 bytes
font_01_sfnt_off0000ff59.bin
dd7c4dd7a8b16f92aca3fe85e30d05d0a03f0852b2a1b311be776d092a2c7981		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF59 10700 bytes
font_02_sfnt_off000117e0.bin
81a65f350a3c5bc6f9740a598c2a40309b083b5ab4cfe08ac3fef5564258fd2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117E0 15800 bytes

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