Malicious PDF — malware analysis report

Static analysis result for SHA-256 160a06f76d1582fa…

MALICIOUS

PDF

80.5 KB Created: 2021-03-16 18:04:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3409ae694b93a77bbf9f415a327f72a7 SHA-1: 96ea484eb00d0658a7d01840ebd843b16ac67d00 SHA-256: 160a06f76d1582faa258b148541495c9295435b0f368a46b118b3c11fe73079c
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://mezovuduw.ru/strik?utm_term=hansel+and+gretel+2013+movie+clips PDF link annotation
    • http://sizuxofutitarax.mypressonline.com/kanomibu.pdfIn PDF document text
    • http://wunuxuvi.sportsontheweb.net/finuvarovuvasorefamowa.pdfIn PDF document text
    • https://cdn.sqhk.co/kukelagalefe/6U9jgjO/24220196589.pdfIn PDF document text
    • http://nibakelenixezas.getenjoyment.net/66131181126.pdfIn PDF document text
    • https://cdn.sqhk.co/xidafigutoxa/ggRiggc/real_chess_set.pdfIn PDF document text
    • https://cdn.sqhk.co/mepejuwaj/hbifhf7/xprofile_mod_apk_rexdl.pdfIn PDF document text
    • http://pifedalune.medianewsonline.com/actus_tragicus_piano.pdfIn PDF document text
    • http://motarojetox.sportsontheweb.net/bertrand_russell_philosophy.pdfIn PDF document text
    • http://zizodoroluxonaf.sportsontheweb.net/fujitidimidubodin.pdfIn PDF document text
    • https://cdn.sqhk.co/dunokufimove/hjjVuij/rumekovesiwogike.pdfIn PDF document text
    • http://bivaxosufuxibo.mygamesonline.org/how_tall_was_bruce_lee_in_feet_and_inches.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1261df91-4e32-40b2-8b8a-4050d3c54cbb.filesusr.com/ugd/df69c1_495d91f17f6c4600b5a870cd85d61039.pdf?index=trueIn PDF document text
    • https://d89d6b52-6e76-4e18-bccb-bd7428cfddad.filesusr.com/ugd/02beb7_2a9fcfac7ed548beae048e5cf5f41abe.pdf?index=trueIn PDF document text
    • https://12c48f50-3553-44c7-a31c-19fc5df83d07.filesusr.com/ugd/7e0eb0_62f8d541c64349a3b29f91704341e55a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/da748594-8702-4a62-b0b6-6236bd346b8b/figeni.pdfIn PDF document text
    • https://e432c3f7-acc0-403b-bc7f-1b8c16782643.filesusr.com/ugd/6a4899_624d8193a43f44af823f105177b690c4.pdf?index=trueIn PDF document text
    • http://gonegexunu.myartsonline.com/65830497640.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/524002a2-f982-4594-a39f-4fc95993c0ac/managing_complex_change_model_lippitt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5491e8f5-00f1-4d86-a9b8-186d988405ae/88440151278.pdfIn PDF document text
    • https://dc383e6d-b7a3-4e67-a88a-227fa542b6c3.filesusr.com/ugd/72b0e7_3ba0a9e8712943d9ad3cb25d7ea7321a.pdf?index=trueIn PDF document text
    • https://3c45aaf8-24f3-4cde-9773-cf44a0a970d3.filesusr.com/ugd/ae7d54_f855ec174271477ca4179a902d86afff.pdf?index=trueIn PDF document text
    • https://63b1f34b-4847-450f-8d9a-4788d10e1cf5.filesusr.com/ugd/451a43_17dec7d27621418b9a4bcd4d8ddfc405.pdf?index=trueIn PDF document text
    • https://1ffb5d6c-d890-49e0-9b87-dc10fbfa49e2.filesusr.com/ugd/8bc2a6_7afdfde4e2de4460b86f62af52960e3e.pdf?index=trueIn PDF document text
    • http://womidelere.myartsonline.com/togakugub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8db8a469-66f7-4715-80d9-1980e5ee5ba2/pelanikituwobimu.pdfIn PDF document text
    • https://cf2e1f24-e5f1-4289-9567-3affce9c164e.filesusr.com/ugd/a4ea6c_4e9e852f007e412bb6374002668e6a97.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f57a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57A 5904 bytes
SHA-256: 7c106ec8d74c562461d5591f59c34794b2c55ff4f668e753943d79b49a21435a
font_01_sfnt_off00010984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10984 12176 bytes
SHA-256: 247f24e5fcb8dffa741fd81c262853fe1d92edf44c463330b44d11c94c67ddbd