Malicious PDF — malware analysis report

Static analysis result for SHA-256 d47b297c80214491…

MALICIOUS

PDF

81.3 KB Created: 2021-08-18 06:30:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 47e5f10e20bb7840662333a2990fdcb5 SHA-1: 735e457a0571267f926d7d73a28a91062be70ba3 SHA-256: d47b297c80214491a8cc93fe3ce6ed2764d199d067b3053a5fbb7ea020656901
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's likely a phishing or malware distribution lure. The document functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised WordPress installations. These links are likely intended to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://nomylo.ru/uplcv?utm_term=how+to+afford+a+dodge+challenger PDF link annotation
    • http://babywagen24.de/userfiles/file/81217908132.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/7stc4lnv68kq7n8sfsdt7sk992/vukof.pdfIn PDF document text
    • http://manhchenang.vn/webroot/img/files/topinoxopikaponarowun.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b23a635fbf8---88749696213.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160843b44b65b8---zogikibobijulokukobu.pdfIn PDF document text
    • http://rencontres-icare.org/userfiles/file/mebuxitusej.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b005d9dad0f---watasekepikij.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/94838174327.pdfIn PDF document text
    • http://michardardillier.com/ckfinder/userfiles/files/64602679905.pdfIn PDF document text
    • https://mszukam.pl/dat//file/nofofagusujid.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160838168bed2c---sedumoxajosovuk.pdfIn PDF document text
    • http://school15-tyumen.ru/f/72802990208.pdfIn PDF document text
    • http://jun-travel.com/userfiles/file/99148000003.pdfIn PDF document text
    • https://transmar.biz/ckfinder/userfiles/files/69253755452.pdfIn PDF document text
    • https://amoslodge10.org/ckfinder/userfiles/files/jaluxamig.pdfIn PDF document text
    • http://sunwisechem.com/Uploadfiles/files/12436423894.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/88221091733.pdfIn PDF document text
    • http://belloverde.net/emailer/file/58030967224.pdfIn PDF document text
    • http://jamesirvinewedding.com/clients/f/f9/f947a18657f5d77a8fcd192ffd4ccf25/File/rubiwu.pdfIn PDF document text
    • http://northmarking.com/userfiles/files/juxasefuxanagodupa.pdfIn PDF document text
    • http://enjoybowlramenandpoke.com/uploads/files/milomipelexis.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_off0000dc47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC47 16424 bytes
SHA-256: 41e90949dd62c6184e84cf9278fc667ebde4f6723a7fba99188f459edf7d55ca
font_01_sfnt_off000106d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D7 10572 bytes
SHA-256: cc678b577f1963bcdedf263e3c278692298a4aeb21a9cf974d83609483850373
font_02_sfnt_off00011ebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EBF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1