Malicious PDF — malware analysis report

Static analysis result for SHA-256 b14aa1a7b1e57a74…

MALICIOUS

PDF

93.2 KB Created: 2021-07-05 18:49:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 59669a9812a19aabb8f592253e92ee0f SHA-1: b5bcf6326832579a7c7e293e67640d98e53a7555 SHA-256: b14aa1a7b1e57a74ff6cf5e01b83dc1f6b73e59bfe344cb410d414fa43f6c6a6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many hosted on compromised WordPress sites, suggesting a phishing or credential harvesting attempt. The ClamAV detection and ML classifier strongly indicate malicious content, likely designed to trick users into downloading further malware or visiting malicious sites. No scripts were extracted, but the presence of multiple compromised URLs points to a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://drafthe.ru/uplcv?utm_term=i+have+attached+my+resume+for+your+convenience PDF link annotation
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/7b2d1291a388c51cf2869177a5cab5b7/joxesoboduwafiroside.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4045f3672---disilasotivogabifamirip.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/4cef06dd556f80a875c719651577b41b/finowojekibuput.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/93afab42122645d9e6982ed2a390abdd/turetasi.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/2ad42bb3ae6ca3966d0ad9ddcadb2bea/jesamaxijesak.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/kosifo.pdfIn PDF document text
    • http://flambotour.it/themes/userfiles//files/31428682675.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d9eeedffc9---zusavadimevotikigivufuf.pdfIn PDF document text
    • http://europavloeren.nl/siteimages/file/8389530068.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/crt8r56rqo3lto8fo0vbr43kfm/68296548336.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/7682a6c8cf72c1a7b240cce8e30b0a38/94152449114.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160788ae067849---guwib.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/2eb1b99ea989137090c2f557b616216f/bexasabakewitarapobude.pdfIn PDF document text
    • https://computerzone.pk/file/13884308533.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/hl58mblfmn367gmi0o3o1n9no4/10519998923.pdfIn PDF document text
    • https://www.tanyadantus.com/wp-content/plugins/super-forms/uploads/php/files/e8caa63c4964abaa0b4cf8ccc0915d2f/23500580771.pdfIn PDF document text
    • http://cokhiminhhien.com/media/ftp/file/30029703308.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb662241b9---gimapekidanomanavavuzora.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b482fadcd97---foboregivegewikifopoxara.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/0d8ae37342133b3a59b76c3268e5c444/69191930795.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/ndm1e9t0j28dhoift48ss97aid/44352190602.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/j86u4lf5erlldcquencee1rcn3/23152453748.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/7tsj5k28j6e7secgp9jdobnqsl/17325152718.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_off0001056d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1056D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011d84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D84 10924 bytes
SHA-256: ac83faff0ff7f992d87fe5149e0dd4d1df155b26e1297e44ec2a218b77a757c8
font_02_sfnt_off000136b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136B2 18444 bytes
SHA-256: c1d5dcca7d442b33f1ba63b0ffa148744d82edc265b4142c0c7f76aff81e4225

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