Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ef2aaa4c04dd915…

MALICIOUS

PDF

97.1 KB Created: 2021-07-23 07:46:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 97844ae963f7ee98bfa2e5a8ecd34d7f SHA-1: a8cd73fcb82224366e7ec9635c60abbf2ff6a343 SHA-256: 9ef2aaa4c04dd915a0f361edd4684db443e2ffbe7c4595010312f1c51cfcea1f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, directing users to numerous external URLs, many of which are hosted on compromised or disposable domains. While no scripts were explicitly extracted, the PDF structure and the presence of numerous embedded URLs suggest an attempt to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://catbasailing.com/upload/fck/file/98553331676.pdf In PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072da34cd519---22003580250.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/bevanepimidaxem.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/5f25d2e5d71b178d21399df80ad4faf8/tadojuxudagufo.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/46588106546.pdfIn PDF document text
    • http://lamelove-zakryti.cz/userfiles/file/20738773079.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210609075838.pdfIn PDF document text
    • https://triangle-electronics.com/assets/userfiles/file/wowesawasomajobevoruwudat.pdfIn PDF document text
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/834f9fb0e95fab2060a8d5023b05ebdf/24214198738.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/pavofaleb.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160e63245c99c0---52717945089.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f7b05056d22---poditazawolez.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/eb5bfe577a711fd70772c147866aabd0/65655093032.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e81066f27ab---22564103434.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/10361f3e2f3f7749d34c5b17590d7077/sedejasalenibadilefatag.pdfIn PDF document text
    • http://vucert.vn/uploads/files/nedanufotudivifojodet.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c0a20e8b784---58029933803.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/st38njk9ijrs8pohn78vejg242/jozewinuwox.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/4f888b950169dbfce3e1b1bec4f77249/zaratumajepa.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/bojaselevizanu.pdfIn PDF document text
    • https://fier-forjat-valimet.ro/ckfinder/userfiles/files/dumojimetid.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/62092261477.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=best+single+player+games+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_off000118af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118AF 16808 bytes
SHA-256: b4f3e881f8d039d64aab20dbcf721305b3a476374280e950f74de9e72c6fa414
font_01_sfnt_off00014460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14460 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015c77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C77 10884 bytes
SHA-256: 8776a0d98b9f6d5d5708e5e65195bc11eda94b0a39863892ba1b0b2d37078a24

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