Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd7eed7bafd76db5…

MALICIOUS

PDF

70.6 KB Created: 2021-06-17 14:42:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 73e9faedee60900e85761b6673427fa4 SHA-1: 59a4cd5f32cf5b62c0a368a2a0984b5f6aea409a SHA-256: fd7eed7bafd76db5fefb2975b99291dd09a705d97dfd430e843acb08726c1f86
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress upload directories and other disposable hosting, disguised as a song download. The document body is heavily obfuscated and appears to be junk data, suggesting the primary purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ixtvs.de/_upload_bilder/_filemanager/file/76920071237.pdf In PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/8298fa616aa07bcc5dc3dfaa0098045e/foriserarozukokefe.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/aojooka1gcvot134odigdibnnu/zizibiladigogitozemag.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/62914272398.pdfIn PDF document text
    • http://randalljroutson.com/clients/44711/File/muralib.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/16826787544.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ad87537716a---fizugabutejekukidaf.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086714302b7d---xibogimulefijasodabijawem.pdfIn PDF document text
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/d80d9cc173b26dd81f2f843ab53006e2/safatamapowuj.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/rstecabdo7fv8ig99k42i02st0/sedakezazonusi.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ce27714ea---53206093831.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/111c55338d1bba62b80c951f22896d18/99638137492.pdfIn PDF document text
    • http://tunglamgarden.com/images/fck/file/98970693337.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ab3b3c7558a---72785147551.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c6e679553---80605056238.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/rrcofq5d5dvgaa7cq5qt81qr8d/lomituf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=sajna+hai+mujhe+sajna+ke+liye+remix+mp3PDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD591 5636 bytes
SHA-256: b04ded909dd0112d17bf45f6d1547bac8c47162bdc9f9108a333700c117d7250
font_01_sfnt_off0000e8a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A4 11228 bytes
SHA-256: 47f9a7bb2ae08f5d518d39409a73adaf88457a252406794767d772d23c7a87a8