Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7ebec962e283be0…

MALICIOUS

PDF

93.8 KB Created: 2021-05-28 07:54:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53b3699ea55cad91de81eed2ac7bff75 SHA-1: a8114fcaf7574a4f5708d2379b0f9d5acaf38214 SHA-256: e7ebec962e283be0cb28e5f4e5e79f2a7c042644bfab4d39765f3a0cef698ccf
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains a large number of external links, likely for SEO spam or phishing purposes, directing users to sites like 'gimoguvi.ru'. No scripts were extracted, but the presence of numerous external links points towards a phishing or content-farming attack pattern.

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/strik?utm_term=how+to+write+a+social+media+analysis+report
    • https://dizubegunusu.weebly.com/uploads/1/3/4/8/134889053/4750572.pdf
    • https://bululuxoragoxoj.weebly.com/uploads/1/3/0/9/130969030/fazowun.pdf
    • https://cdn-cms.f-static.net/uploads/4446494/normal_6023ad454b59d.pdf
    • https://gunosevibo.weebly.com/uploads/1/3/4/7/134716368/371f6425482305d.pdf
    • https://pudajimerexinag.weebly.com/uploads/1/3/4/8/134896131/590b26.pdf
    • https://kufavugozit.weebly.com/uploads/1/3/5/3/135309998/kijinibol_budixebaworu_linoxaxo_laxozenugeraga.pdf
    • https://static.s123-cdn-static-d.com/uploads/4421983/normal_60b0672cad9eb.pdf
    • https://cdn-cms.f-static.net/uploads/4414495/normal_5fe8fd2244168.pdf
    • https://cdn-cms.f-static.net/uploads/4451368/normal_60616557c7022.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2670901c-cdee-4094-8967-48234dfddde5/bayesian_model_averaging_a_systematic_review_and_conceptual_classification.pdf
    • https://uploads.strikinglycdn.com/files/43b2441a-7fbf-4ddd-9c4c-c8c5d60a65fc/what_are_the_three_inventory_cost_flow_assumptions.pdf
    • https://uploads.strikinglycdn.com/files/fa5d8287-d359-45c6-980e-63d340840b5b/cradlepoint_ibr600lpe_manual.pdf
    • https://uploads.strikinglycdn.com/files/b2b28697-70e8-4531-9ccb-f6e458a2d0fd/hoist_v5_manual.pdf
    • https://uploads.strikinglycdn.com/files/64f8deaf-99f9-42a5-956f-d77b2ae7be4a/how_to_build_conflict_management_skills.pdf
    • https://uploads.strikinglycdn.com/files/e63fa16a-2a53-49eb-80f4-20bfcd77f1d2/old_school_pizza_tavern_menu.pdf
    • https://uploads.strikinglycdn.com/files/830130b2-1886-4175-a8a5-6a773f58aa68/21211874937.pdf
    • https://uploads.strikinglycdn.com/files/d9280f97-ed3c-445c-b80a-83a587475e98/can_you_still_get_minecraft_windows_10_for_free_2019.pdf
    • https://uploads.strikinglycdn.com/files/d3b94b59-89ec-4fe4-905a-dafc639cd9b3/risiximezotaketefibokiwim.pdf
    • https://uploads.strikinglycdn.com/files/7707ab3b-a66e-4089-acd4-95da94d8bb1b/garrett_ace_350_pro_metal_detector.pdf
    • https://uploads.strikinglycdn.com/files/7b8e33e1-3305-4256-8d30-358b03e88398/35918367213.pdf
    • https://uploads.strikinglycdn.com/files/c822f7a0-2f5b-48cf-bd44-dff8f09b2bff/basic_model_of_strategic_management_with_examples.pdf
    • https://uploads.strikinglycdn.com/files/a3c0cfce-715e-4691-8639-ac1c1f901f13/51070581189.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_off00012fe0.bin
c471045666476dca22f9ee183c4a4b841deccc4609369fc12467c700ce3309dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12FE0 5376 bytes
font_01_sfnt_off00014224.bin
e18cb6a66e44d281bdc6c01781468fcb3e96d55f87d95bead13fa11405e099e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14224 11632 bytes

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