Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a6c90c330ea0d80…

MALICIOUS

PDF

84.1 KB Created: 2021-07-02 18:58:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: af5830d2fb2aab7729b24a88ab91bfb9 SHA-1: 2a1051dd5e9b7fc5e24a6d11c35ccc16b604984b SHA-256: 9a6c90c330ea0d80bbb796ef71096c61161497060ec259ef7ef705c341ff8b48
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple potentially compromised or disposable hosting sites, likely for phishing or malware distribution. The presence of numerous external URIs and link farm heuristics strongly suggests a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/b5240a3d6cac3195fa2e78e3f23871a0/11266980867.pdf In PDF document text
    • https://maychieuvinh.vn/upload/files/32146729360.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/6ee652e8984e1aa8db172be0e544e46a/xegulizok.pdfIn PDF document text
    • https://carparts-fixture.com/file/file/zonewejaf.pdfIn PDF document text
    • http://xn--80aamdqpfpr.xn--p1ai/upload_picture/16435016130.pdfIn PDF document text
    • http://xn----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/14934018653.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3ab06beb87---sipev.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/ede6c7d2d72b75b244a202ea58e1a99e/razuzinavika.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd7f0ef6be---18655195506.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609d0ccac5e25---73270743812.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/gojutamafawofavevukipaf.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/232c373af956cf15ca6f0cea56058a90/jezuzokabobujavirulogo.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/12496123780.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/frjie3u1lk2hrc3t031j4krs51/tiwesela.pdfIn PDF document text
    • http://dermaktif.com/imgup/file/97997400329.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b7056807ddf---voxenevupev.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/og2vs9t6cncgmnmvq22tv9gg4a/5079968607.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-5-14/20210514014733355029.pdfIn PDF document text
    • http://glamour-nsk.ru/ckfinder/userfiles/files/savoxigupobo.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab5772dce06---32781764804.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8d745c945---5677168465.pdfIn PDF document text
    • http://pk.mo/userfiles/file/17830590453.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=addition+and+subtraction+of+mixed+numbersPDF 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_off0000e320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE320 10916 bytes
SHA-256: 913fa11138915459d26665d935569b9983d645cad19dc968f5c77cd3c25d25a5
font_01_sfnt_off0000fc75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC75 17564 bytes
SHA-256: 4216e1762d8aeb978ce6be6a9fa28dd1b842e60b271e4e4c7c3c508d66131a7e
font_02_sfnt_off00012ade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ADE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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