Malicious PDF — malware analysis report

Static analysis result for SHA-256 274609bcc37ab3f9…

MALICIOUS

PDF

92.2 KB Created: 2021-07-04 02:03:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 3399ec49a69e9c4fd843910883eb57bd SHA-1: dc52facec97a9ea6d1c7eb81ff66a608b30e7232 SHA-256: 274609bcc37ab3f9bcbc9a198361772abc48470f897842809b4e4a386b955e1f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute further malicious content or phish users. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/582145a90ad2b6725e8dcb384bd01fe4/xopaxubuxotekawikoxitanid.pdf In PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/p5tee0p8fds3k29ndloa1eg9d0/pujujubiz.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f18bd5334---47329302321.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607db44b99102---fadawefetesoluripetik.pdfIn PDF document text
    • http://naturallabs.de/userfiles/file/wazudoxiregorofuxagot.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/2cuj6pv61pgddlo43eoqhm2ct3/61931880636.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/16079eb0429f39---susigepujeverorin.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abbbbf7130f---96664007593.pdfIn PDF document text
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/sejusoremeparubota.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b546a001596---somupigofukogatu.pdfIn PDF document text
    • https://tonymusic.se/UserFiles/files/dojamuxi.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607c317aec168---zotubidinenu.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba5b538900---sarixarojobaluvowakalok.pdfIn PDF document text
    • https://gonguyenkhoi.vn/upload/files/roked.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/4268282519.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160afa2cfa09d7---73897703998.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/xonogejonal.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/cc157519e2a9cdfe9f8957e9c5a7de45/95311986635.pdfIn PDF document text
    • https://lamthong-marchph.com/piceditor/file/22935022954.pdfIn PDF document text
    • https://noticky.net/akce/fotky/file/63101323602.pdfIn PDF document text
    • http://peneleos.pl/userfiles/file/86861989133.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=gta+5+roleplay+xbox+one+2020PDF 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_off0000f78a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF78A 10756 bytes
SHA-256: 8b8d8f8128379a8cba5a24bc12db5158f1a28be6cbf822b74be60b68146dd48a
font_01_sfnt_off00011053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11053 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12865 29288 bytes
SHA-256: a605edf95b60e45c28df2e5b31a0c5bd4eada669174328cb872214259126c209

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