Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee5743d669ab052c…

MALICIOUS

PDF

91.6 KB Created: 2021-05-29 08:08:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c11a5d44ffb7b1a5e96bd62134e7321 SHA-1: 9c5e4cc6f505f93287ff6f025689520e4282c628 SHA-256: ee5743d669ab052c51a7b7c0cca81466aeda648a3bf07efcc0c9b98344c4a800
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to Weebly-hosted PDFs, suggesting a link farm or phishing campaign. The ML classifier and ClamAV both strongly indicate maliciousness. The document body, though heavily obfuscated, contains references to 'sketch action photoshop cs6 free' and application metadata, potentially serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/123?utm_term=sketch+action+photoshop+cs6+free
    • https://tovijivesigaz.weebly.com/uploads/1/3/5/3/135327805/gorunera.pdf
    • https://zixafozete.weebly.com/uploads/1/3/5/3/135349102/8095126.pdf
    • https://balalowomave.weebly.com/uploads/1/3/0/7/130738893/5743997.pdf
    • https://nogusevufofe.weebly.com/uploads/1/3/4/5/134525370/1187196.pdf
    • https://kubikogemovi.weebly.com/uploads/1/3/4/0/134095998/kivegazokelimunod.pdf
    • https://keboxineb.weebly.com/uploads/1/3/0/9/130969034/kufomijinumukage.pdf
    • https://zujamabosav.weebly.com/uploads/1/3/4/3/134363941/lazufef.pdf
    • https://renejineb.weebly.com/uploads/1/3/5/3/135322717/528b53.pdf
    • https://fedubipogumuwu.weebly.com/uploads/1/3/1/3/131379546/buden.pdf
    • https://ragusixiseditof.weebly.com/uploads/1/3/0/8/130814169/8956726.pdf
    • https://mutobituza.weebly.com/uploads/1/3/4/3/134352411/ef24182883e3.pdf
    • https://sukowuxipimo.weebly.com/uploads/1/3/4/3/134318810/xomezabip.pdf
    • https://toripifisesu.weebly.com/uploads/1/3/4/3/134367164/vatejujituxi_vogonesakarunod_mudevajetikoj.pdf
    • https://fevebelok.weebly.com/uploads/1/3/4/0/134012800/zowutuju.pdf
    • https://sovakevu.weebly.com/uploads/1/3/4/3/134341498/xoxare.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6460349c-e20a-4354-bc11-f41be87657a9/data_manager_job_description_school.pdf
    • https://uploads.strikinglycdn.com/files/8ade4f74-7d75-43a9-ad29-017780672e72/como_agua_para_chocolate_capitulo_3_completo.pdf
    • https://uploads.strikinglycdn.com/files/3fe6f995-3931-4841-8d85-4d6911881c15/the_tipping_point_malcolm_gladwell_en_espaol.pdf
    • https://uploads.strikinglycdn.com/files/16f360d6-871d-4b49-8825-29a803c45a91/46058910242.pdf
    • https://uploads.strikinglycdn.com/files/cb37649f-c646-4b0e-9554-bfb8fae19b58/what_would_cause_a_ge_refrigerator_to_not_be_cold.pdf
    • https://uploads.strikinglycdn.com/files/96894f29-04cd-4f83-bd8d-4045f932e975/flysky_fs_i6x_manual.pdf
    • https://uploads.strikinglycdn.com/files/da439715-82f8-46d4-86d8-603d9c5814b8/a_world_of_ideas_11th_edition.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000126a6.bin
9f7e9782f4f97437c98b0ef3b721797d90ef70d085a91353b372f4c451a6e263		 pdf-font-stream PDF embedded font (sfnt) at offset 0x126A6 5392 bytes
font_01_sfnt_off000138fc.bin
949bae32020340d1fa92a40f4066763671c9f3c36745c766219110f15ef1b9fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x138FC 11692 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.