Malicious PDF — malware analysis report

Static analysis result for SHA-256 745f98c137076565…

MALICIOUS

PDF

106.0 KB Created: 2021-06-28 10:46:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: ba575043872608bc116793daa6e6cc43 SHA-1: dc87ca6dbfe6e4d65a5015a6c9d5b0e298c34dc3 SHA-256: 745f98c1370765658e3eafe5ce67ac3235bcd3121ed32426e1f81cf4a4decc5e
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm used for phishing or distributing further malware. The PDF structure and embedded links are consistent with spearphishing attachments designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://archism.ru/uplcv?utm_term=andrew+tang+chess PDF link annotation
    • http://trungtinjsc.vn/upload/FCK/file/23756169594.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160904aa1a730c---jarifurukoparuteverebafel.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/d5bcf855ec6d152339accdae896f62ec/19866556339.pdfIn PDF document text
    • http://almar-bus.pl/userfiles/file/56745558738.pdfIn PDF document text
    • http://studioagronomoserragiotto.eu/userfiles/files/lenalevaneve.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/0hoimes2s89piql6pa6dhkumne/52284362066.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/i2b97vnt8ep4cdlmbst9etdeh2/85577749147.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d1c83e04d43---xozokaxekiwelapopezum.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e615daa0b4---14004490140.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c4dcc1bbb88---57672482780.pdfIn PDF document text
    • http://manninareunion2012.com/clients/0/03/03b30fdf9aaeeba733afadbef254ff7b/File/bowatijax.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/wekazawiraderi.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/3pv63712uv7seb9no9a1n68820/94702117786.pdfIn PDF document text
    • http://candybeauty.vn/upload/files/vofuruketegibus.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/25135987594.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608c184eede56---99420708490.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/c6l2tlk9lr41lfto2j18ehg1bf/48242438149.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-5/file/remaladivedefa.pdfIn PDF document text
    • https://sealskinz.ru/files/file/4437952310.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160909bd7a4f7f---79391585277.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608e2c45e2193---80389244869.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_off00013290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13290 23776 bytes
SHA-256: aa960f577722a0674235561f5a81cdd09f6a179f627b1ae28b9f9f8f29720bfa
font_01_sfnt_off00016b58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B58 10460 bytes
SHA-256: 0688bcbecfb6144dfaff9c867f09994d0257001e50b58dac86fdbcedc59eff6f
font_02_sfnt_off000182ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x182EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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