Malicious PDF — malware analysis report

Static analysis result for SHA-256 69606970c7a930ab…

MALICIOUS

PDF

84.3 KB Created: 2021-09-01 23:19:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6f395d238dc01bb367defa4bfc78eda2 SHA-1: 20448a28c935182c88fdfd90de0b7177a01a56d7 SHA-256: 69606970c7a930ab3697f73de09519ae673fac584a36d5c214a67f5a9dbc77a2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or SEO poisoning attack, likely leveraging embedded JavaScript for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://drosamahetta.com/userfiles/file/mepepoboniwonadeje.pdf In PDF document text
    • http://nt-module.ru/ckfinder/userfiles/files/menoxenozuxobotubomusef.pdfIn PDF document text
    • http://biogenetec.tw/image/files/20210730_015252.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607be1338fa58---60421807338.pdfIn PDF document text
    • https://allegypttours.net/userfiles/files/4618981249.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160775554dd108---32428727123.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/3d4h7n202n7qmm7gbfl36345m3/93471813455.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef39a554a2---34821965675.pdfIn PDF document text
    • http://iburgisidimarsala.eu/userfiles/files/49518014906.pdfIn PDF document text
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/81330674487.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b790fd155e6---7261878187.pdfIn PDF document text
    • http://nissanotogovap.vn/uploads/images/files/2794065673.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/d442f161f03230c5f7558b685d64532b/80237277358.pdfIn PDF document text
    • https://cahayaapi1.com/contents/files/16426671072.pdfIn PDF document text
    • https://arch.ua/ckfinder/userfiles/files/70238210898.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/1acc85f1de3270b91fb8b04a6ac57447/11771766656.pdfIn PDF document text
    • https://smartcirclegroup.com/userfiles/file/jobija.pdfIn PDF document text
    • https://giraffeng.net/infodaily/gen-ckfinder/userfiles/files/24625234080.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/7432d881042f92b085ad2fb93a2cc31d/mipopapumoni.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/i5pfcffb0t5c1ai74rfrl3aumu/sinosajojosemuniv.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/69630026042.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/9gh35hl2t4hp6kpiev89a81pan/24280556904.pdfIn PDF document text
    • http://gwtcs.org/Content/uploads/files/sezelewemiwuku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=wassily+kandinsky+expressionism+paintingsPDF 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_off0000def9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f70b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70B 20144 bytes
SHA-256: d935e589713963a9ef193b6f6b3c1c424627a3344498a0b9a3e4f4839d08337b
font_02_sfnt_off000129e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E4 11036 bytes
SHA-256: d525a541f4f06f553355d90f9c9e7c9c8716eb598c66b16ac688ae752f7d6825