Malicious PDF — malware analysis report

Static analysis result for SHA-256 60485e02576d7e39…

MALICIOUS

PDF

86.0 KB Created: 2021-08-18 11:43:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4195168d2a77b083d7c582cd8846724b SHA-1: 0d89f66d270121fd2829d331c82733e2bb6b3f94 SHA-256: 60485e02576d7e39915d0427b92e924cd33b1fe9e76ad65c7b7ac15cfc959fb2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm for SEO manipulation or to host further malicious content. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classifiers also flagged it as malicious. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a phishing or malicious content distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://natyabio.com/uploadfiles/36023561558.pdf In PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/ta3ckbfpibf757kvslabk1pdb3/94006377041.pdfIn PDF document text
    • http://women-for-marriage.com/ckfinder/userfiles/files/99157430905.pdfIn PDF document text
    • http://okudshava.ru/userfiles/file/katofokajawonux.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/saganaroloje.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb20550178c.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608751e906cbe---vozugekukogubozur.pdfIn PDF document text
    • http://samilove-payitforward.com/clients/f/f9/f9b0b202ed5d2cb263a89f8a9bd08a94/File/wosubuxeniwovizenozuz.pdfIn PDF document text
    • http://delshadian.com/public/userfiles/file/kijenano.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/l5oqs2oefv4s5mi876gkhj5jb4/ralemipepunitepibizamujip.pdfIn PDF document text
    • http://pphjako.pl/userfiles/file/xerupobugipowovuninubewoz.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9ca8ab6ee---10103539545.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/047e8319969929cfa581f7d7c0b1ab79/lulexa.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/4d1afc35c1d45b937f813c47d294cca9/76307665322.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/t57nillejeokcitkrnh3d64pb1/80727067984.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/xivebalolamigili.pdfIn PDF document text
    • https://szaniterplaza.hu/ckfinder/userfiles/files/51110113654.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16100f038d317b---bujutise.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a506cbc91d---36241231895.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608026eca93c8---69345724511.pdfIn PDF document text
    • http://ridendo.cz/files/file/89732038866.pdfIn PDF document text
    • https://dolupin.com/calisma2/files/uploads/45365715510.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=engineering+mechanics+statics+14th+edition+solutions+manualPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A2 18796 bytes
SHA-256: cec5c81b98161c88e5cb69ec65c1890c6bbbca13c80e06b33680092b03adeb18
font_01_sfnt_off00011596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11596 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012dad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DAD 11032 bytes
SHA-256: ff78fa07ec407fb1392f4f23da34f1ea219ae24c9b5bf10252160aae25639b63

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