Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1980365182e7977…

MALICIOUS

PDF

85.9 KB Created: 2021-09-07 10:23:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a87bef7afa61e4d3a7bf45b26957481d SHA-1: 109dff6d389c5cf044ade0b093c701acf2788632 SHA-256: e1980365182e7977a9015a57e0873f344d6ab5b55b9abf3469978e0e567b0477
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS upload directories, suggesting a link farm or phishing lure. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification further supports malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 http://vanhacollection.com/images/files/sodixazibapidini.pdf In PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/im6kpd3vpao8pl00j2u7c6dmu1/wabososid.pdfIn PDF document text
    • https://cuacuonbentre.com/upload/files/43617030721.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/4c4a497c6c875c7acf6d7fb99062d1ce/biresen.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/2nm3r8hp10md8rmsiga3lbe1tf/32292012378.pdfIn PDF document text
    • http://abwingsde.com/uploads/files/70554464980.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/37c8acf414a5f5b5d6ff96af84107461/kutegafo.pdfIn PDF document text
    • http://sepremprod.fr/www/images/mediamanager/mopigogapu.pdfIn PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7fe72f029---80475278851.pdfIn PDF document text
    • http://talentfuturesservices.com/sharpinstitute/images/files/nopara.pdfIn PDF document text
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/r1hgldp1595270pgio5mklet7o/rutagijiguwavewagojujigiw.pdfIn PDF document text
    • http://forma8.kz/ckfinder/userfiles/files/44375786066.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/41722920071.pdfIn PDF document text
    • http://cissi.it/userfiles/files/rugis.pdfIn PDF document text
    • http://backupcenters.com/userfiles/file/lukawonuzazaxixofumizesuj.pdfIn PDF document text
    • http://jjinline.org/file_upload/file/fifevileli.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/1120dd4d0739a794dd7e76e94df78165/below.pdfIn PDF document text
    • http://galenbio.com/images/upload/file/12737125996.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb6b1971a1---didedix.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb8ee59407d---vopatifibukijum.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8f27e7150---tovekegemekegunejamopi.pdfIn PDF document text
    • https://artcorner-fiberglass.com/userfiles/files/zoludixozudojasibu.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a58f26c5f22---besiwebapozezig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=halogen+oven+recipes+pdf+downloadPDF 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_off0000ece0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000104f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F7 10840 bytes
SHA-256: 524a9dc75e0d9d225cefbb4031a2cbc448595bdbd53db35de00f746baea575c3
font_02_sfnt_off00011de4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE4 17384 bytes
SHA-256: 38fcce666a08b772e1fd1ce88323ed45236c6631839b96602ef9408e7d5b3b61

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