Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e01f302c3829bad…

MALICIOUS

PDF

90.6 KB Created: 2021-08-02 16:44:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 16e68d4c4ad4edfbd029ee5d2a97979f SHA-1: 35c9b33af37ab32d155f91c4777527a59297e935 SHA-256: 2e01f302c3829bad2ab2814f7ac70e9e5bee6a94bac406dae1e51887033ead51
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress upload directories and disposable hosting sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the links and the heuristic firings point towards a malicious document, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://digitaldaya.com/imagenes/file/28601361188.pdf In PDF document text
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/mad9kel6tvnudb2mbh9plh7124/finagewakimevituk.pdfIn PDF document text
    • https://protectname.xyz/whoisprivacy/userfiles/files/32848632353.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db941c8d510---jafalimuv.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/1f23979b6c6a371a4fd57f4c42d4badf/34681730898.pdfIn PDF document text
    • https://grup-insaat.com/userfiles/file/24828062678.pdfIn PDF document text
    • https://bursakaynak.net/userfiles/file/34441775404.pdfIn PDF document text
    • https://lacaune.hu/userfiles/file/givebo.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/guvesotozuzoxasa.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/wedotakuxa.pdfIn PDF document text
    • https://silky.ae/images/bulk_images/files/kujoberu.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/6304597c201bb095e700e919544d6745/92526860097.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c69d5e55dfd---wetewuruwenujipas.pdfIn PDF document text
    • https://nepalimodelagency.com/userfiles/file/33765285063.pdfIn PDF document text
    • https://9ja-bet.com/userfiles/file/setixiso.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ec9dcf061d4---lexoxumumere.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0f292c2a8e20c07cd4495e3185cb0c9d/datusosamowabumijo.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/faa508099c89d4aed30daf76bd824583/figavetubisovusiselesa.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/wurosadupawupewijatomikuk.pdfIn PDF document text
    • https://hosvagyok.hu/userfiles/file/48295478393.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/f78866f7c5431be46b7ee7fd576d23cd/pifigomovokibabodas.pdfIn PDF document text
    • http://aotwresort.net/ckfinder/userfiles/files/39602050793.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=the+sun+diagram+worksheet+answersPDF 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_off0000fe71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE71 16952 bytes
SHA-256: a48b1b4e5dd49c27fd59bfa2f803609088cd24b1bce63e3f256aeea75fa8a713
font_01_sfnt_off00012a8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A8F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000142a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142A6 10892 bytes
SHA-256: 0624f70a7ae6882c6bd4a13cc702e5d48707d54546e05bc75953be4950e5e31d

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