Malicious PDF — malware analysis report

Static analysis result for SHA-256 058f3fda05f4c7ba…

MALICIOUS

PDF

71.0 KB Created: 2021-04-06 16:29:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f869167334cf9e781304be741d519479 SHA-1: 929ebc7407ef155c7f45d0ebfcd1819fbf5969c1 SHA-256: 058f3fda05f4c7ba0d706123e20d0664f6a274408a4c08830af384cac20e259e
156 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which point to potentially malicious domains, as indicated by the PDF_SEO_LINK_FARM heuristic and ClamAV detection. The embedded URLs suggest an attempt to redirect users to phishing or malware distribution sites. The document body, though heavily obfuscated, contains a search query that likely serves as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jumiwimov.ru/strik?utm_term=who+sells+diehard+car+battery
    • https://cdn-cms.f-static.net/uploads/4461746/normal_6044915a60b83.pdf
    • https://weruvuwixaxo.weebly.com/uploads/1/3/5/9/135972833/fetoxirepatuw.pdf
    • https://cdn-cms.f-static.net/uploads/4488574/normal_6041056a49772.pdf
    • https://cdn.sqhk.co/tejilunuf/0PDYjjw/rope_rolling_machine.pdf
    • https://gejilesiwurulu.weebly.com/uploads/1/3/4/3/134374779/84f3bef98406.pdf
    • https://redulexaxoxega.weebly.com/uploads/1/3/0/8/130874010/aa86948e0.pdf
    • https://cdn.sqhk.co/lisakopew/YjaibUO/88291191307.pdf
    • https://silukirajewulo.weebly.com/uploads/1/3/2/6/132695932/e60f34235.pdf
    • https://cdn-cms.f-static.net/uploads/4404108/normal_6026ea5a275b2.pdf
    • https://jinepesel.weebly.com/uploads/1/3/5/3/135346763/vefitave_wusovisamikoni_luxewosuximi.pdf
    • https://cdn-cms.f-static.net/uploads/4382973/normal_6054e3dae09d0.pdf
    • https://cdn-cms.f-static.net/uploads/4470224/normal_600c9d06f282b.pdf
    • https://cdn-cms.f-static.net/uploads/4450723/normal_602639272185e.pdf
    • http://vowujebotoza.mywebcommunity.org/codigo_penal_comentado_cesar_roberto_bitencourt.pdf
    • https://cdn.sqhk.co/jakufomego/gf2jczD/setufefugizutuku.pdf
    • https://cdn-cms.f-static.net/uploads/4458622/normal_60601ac9a4fd5.pdf
    • https://cdn.sqhk.co/raxuzuvuluf/vhhgcSW/fonafekudizidumedur.pdf
    • https://static.s123-cdn-static.com/uploads/4488817/normal_5fc575bb9beb7.pdf
    • https://cdn.sqhk.co/pigajifaw/iehjGIu/42519967991.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e6551ab9-58db-4077-9a13-9e901ad7c0d3/business_analytics_course_in_usa_without_gre.pdf
    • http://minivenema.atwebpages.com/file_b_li_font.pdf
    • https://uploads.strikinglycdn.com/files/83ce2946-877d-4a77-99d7-4c813b869e0a/google_maps_show_location_history.pdf
    • https://uploads.strikinglycdn.com/files/dbc18fb9-ba28-473f-a3c4-58c2dbeb3bcf/what_are_the_salient_features_of_constitution_of_nepal_2072.pdf
    • https://uploads.strikinglycdn.com/files/5240c741-0516-4e24-8d53-1736a5039c24/the_tangential_speed_on_the_outer_edge_of_a_rotating_carousel_is.pdf
    • http://tajiroxajesolut.atwebpages.com/area_and_perimeter_of_triangle_worksheet.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_off0000dac2.bin
88e1915b270fa45e8fc3fc1cafe76f91d2b6dad4cfdf447e6a4f4756389358d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC2 5280 bytes
font_01_sfnt_off0000ecbe.bin
0d8cb83a345102863499852a6087dbb16645738378f148617484fb693c22f8ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECBE 9900 bytes

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