Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0d5a9eba8d67ebc…

MALICIOUS

PDF

74.4 KB Created: 2021-09-06 07:33:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c1bea4091e68772a5af4d2cc342d76cc SHA-1: f6bd280bec50561ca35c544700be815594420887 SHA-256: a0d5a9eba8d67ebca9bbfe3f6ccf7e6916cee22fa144a6ff091a04b740079c38
196 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, likely intended to trick users into downloading malicious content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security. ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a7320730209---70367260923.pdf In PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/klqg7jrjvd4kpvrq94d4hv9ta3/sedozorunonizuxiba.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160713d0a6ef6b---10396192858.pdfIn PDF document text
    • http://schs1968.com/clients/861610/File/5388942170.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/654d82c0f9972e7682a41fe72c08b79e/vumozo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6546c29521---somobopuwus.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/a80b062263cdac79470859b2a0c73de9/gafemulopakapum.pdfIn PDF document text
    • http://ekopaczka.pl/imgbrama/files/26234491881.pdfIn PDF document text
    • http://camel-republic.com/media/userfiles/files/jewamewokizoraranukab.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/5941940075.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///tasoge.pdfIn PDF document text
    • http://wittlich-luexem.de/userfiles/file/fevuxixetiribobonu.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/55c311ba5ab50b636a3f37607d64aa26/folejowises.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073686611093---30202923052.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b4e57c9cfe4---pubuvudedunulana.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/d01c5fb1ff309830fb72494bc81f7ebb/fodetes.pdfIn PDF document text
    • https://senesi-sklad.cz/userfiles/file/jivotomemigesidetilawe.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/bojoseji.pdfIn PDF document text
    • https://moscreen.in/cmsfiles/file/370575491.pdfIn PDF document text
    • http://abwpetersburg.com/uploads/files/39819087159.pdfIn PDF document text
    • http://jamesirvinewedding.com/clients/f/f9/f947a18657f5d77a8fcd192ffd4ccf25/File/dixumadalobanizavopu.pdfIn PDF document text
    • https://ngusacdon.com/upload/files/nikigewaberipodujelip.pdfIn PDF document text
    • https://qqhanoman.com/contents//files/29195855070.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/5s8c1ae2shqqa294u3uo6lu9i2/11636836629.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/0qogbm12eth33oudvnb1h9omk5/foruxoviwi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=soil+stabilization+using+plastic+waste+pdfPDF 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_off0000c26f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC26F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000da86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA86 11156 bytes
SHA-256: aa3d63f124a71a8aa477e03b503fa0bdf386c9c87c15e4da08999fb2acd63b25
font_02_sfnt_off0000f468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF468 15348 bytes
SHA-256: dec0e26350ed1ea003c33e3e3184a32fad4bd5bea88728e7596048989c454d91