Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba6985801d94077d…

MALICIOUS

PDF

75.0 KB Created: 2021-03-31 13:57:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 9da9d070a4df6ffeffbd85f2e5a299d0 SHA-1: d64f42eb577485120505bd0cfe620ca5d356966a SHA-256: ba6985801d94077dfa83674c2311697151d324882f771e4ac115f8092bd2ff3e
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, suggesting a link farm or phishing campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://baarspo.ru/strik?utm_term=zodiac+and+the+salts+of+salvation+part+2+pdf PDF link annotation
    • http://sixesijilolun.mywebcommunity.org/53927317998.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417226/normal_60103ab60b4ee.pdfIn PDF document text
    • http://wedasuf.getenjoyment.net/jeriwafovalalum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402722/normal_5ffc22ff80dc0.pdfIn PDF document text
    • http://frontend-developer-azaynullin.site/how_to_make_dmv_appointment_va0cdt3.pdfIn PDF document text
    • http://zokazurimila.mygamesonline.org/adj_order.pdfIn PDF document text
    • http://argo-tourism.com/how_to_set_a_woods_timer_instructionsbmjf9.pdfIn PDF document text
    • http://wugupomovupa.sportsontheweb.net/83123726897.pdfIn PDF document text
    • https://gafepodaxo.weebly.com/uploads/1/3/4/6/134606739/juvegarefulemulo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368955/normal_5fed247c4ffeb.pdfIn PDF document text
    • http://wersita.fun/23827699716zou65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420592/normal_600b12ff24bdc.pdfIn PDF document text
    • https://likixadukevagal.weebly.com/uploads/1/3/4/7/134700169/9547500.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://eac5c218-d238-408c-98a6-8ff0ecbb25fc.filesusr.com/ugd/b1277d_c4cd3ccd7ac34394a3c66d992d034657.pdf?index=trueIn PDF document text
    • https://b64dd490-e5b9-492f-89ff-e398ecee904c.filesusr.com/ugd/5926b4_77b5db4397084d09b7f0aa2346a4003e.pdf?index=trueIn PDF document text
    • https://6cbe2f5c-748b-4bc6-b691-25a968a47885.filesusr.com/ugd/d6b5da_c4ce3a7b84e640749a3dfd092ac3d49b.pdf?index=trueIn PDF document text
    • https://9cc02d22-446e-415d-9686-6e49aadcb3b3.filesusr.com/ugd/aa6a08_0bc78cab95334ae5bf9c2fa12aba7c21.pdf?index=trueIn PDF document text
    • https://abf133a7-37c0-4616-b653-d99fd306bce3.filesusr.com/ugd/5c8236_b4ab48f4ea6b46e08cc82e281a6fb3fc.pdf?index=trueIn PDF document text
    • https://db532842-334f-4efb-8993-e67ec8f20ff5.filesusr.com/ugd/bc5be3_e374cb0c709c42b18c20d1d24137bf82.pdf?index=trueIn PDF document text
    • https://add83a7c-0e31-48b3-928b-061d82ba9144.filesusr.com/ugd/205ae4_4917cf5161a641a489ba291baf52b61f.pdf?index=trueIn PDF document text
    • https://18574fdc-dbe8-4f24-a3f7-ab3d6ff540e7.filesusr.com/ugd/d45bfa_0821a4f565b148f5832505e409726ae7.pdf?index=trueIn PDF document text
    • https://ee67c5b3-b4d3-4257-b425-af55881d3a68.filesusr.com/ugd/c60da7_4af486c216414716a1d24da2dcd3e86a.pdf?index=trueIn PDF document text
    • https://4328a374-8b5c-4134-9cef-e132ca5fc89d.filesusr.com/ugd/6732b1_5d9905ed9f094684a81a50757e85c990.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7D 5180 bytes
SHA-256: dcc19fe2a4a1571c00d5b670515a3c48a5e6abaf2c4ac5415a14a1f38b2fc1d4
font_01_sfnt_off0000ec1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1B 10556 bytes
SHA-256: c9209ab77c1bf513fbf6613ed8063f80be67a984aacca8db2ca28fe13a11c174
font_02_sfnt_off00011054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11054 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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