Malicious PDF — malware analysis report

Static analysis result for SHA-256 58c7568d09c4895f…

MALICIOUS

PDF

76.4 KB Created: 2021-03-14 04:12:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70445b15ce45458548188c773de94166 SHA-1: eb359e1ae2ea30ab0fa460f057afd780100e0788 SHA-256: 58c7568d09c4895f115827adf7cd802c53a9b772b3bbd454683077f7782d1aee
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 likely part of a link farm designed to manipulate search engine results or direct users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The presence of embedded URLs and the heuristic firing for a link farm suggest the primary goal is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/award?keyword=exercices+argumentation+pdf
    • https://xogovowumo.weebly.com/uploads/1/3/0/7/130738979/7f6a1cbef1dc89.pdf
    • https://bezumovepefare.weebly.com/uploads/1/3/5/3/135337037/senijunedikewo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wovugi/what_size_tires_are_on_a_2005_chevy_malibu.pdf
    • https://s3.amazonaws.com/mukutud/blotto_informal_crossword_clue.pdf
    • https://97783159-ced7-426e-9fbd-60d2bb3342fb.filesusr.com/ugd/00058f_8ed3d47c2dbb41d4b35746b057d05cf7.pdf?index=true
    • https://e1318bff-d970-45e2-bcea-45481503a18b.filesusr.com/ugd/75a96d_7a03acf9e9c741a98987c4340a0c6afc.pdf?index=true
    • https://s3.amazonaws.com/padosumifubobo/love_story_south_movie_2019_hindi_dubbed_download.pdf
    • https://7afcd0b8-98df-42a4-afe0-9544d44c9539.filesusr.com/ugd/74e9cf_110e87f33e7942dabb20d950ccd1e8d9.pdf?index=true
    • https://44eeb0f0-4dc9-4d8b-b3fd-cc7ace98e90e.filesusr.com/ugd/a083a1_86fd567830d142ab9c6c89cc2b50838c.pdf?index=true
    • https://eff7b67d-fef5-45b7-bcd6-ffb1b71d3a14.filesusr.com/ugd/b4c9df_c23c50ebf02f4f1fbea33a61483e93b0.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d979e9ed-a73f-4f7f-97f1-883fbc31bfd4/how_much_is_ps4_on_black_friday.pdf
    • https://uploads.strikinglycdn.com/files/420ca624-071a-4ad1-a292-f2d94cdd5f20/26465334823.pdf
    • https://3c2b787d-8465-4662-bdcc-bf736d584291.filesusr.com/ugd/8760e7_c827843e8bc142b0a28375b62dc000d9.pdf?index=true
    • https://s3.amazonaws.com/silubebebefuju/8026110706.pdf
    • https://0502d5d0-a0f5-47b8-bc1c-644c46e4e431.filesusr.com/ugd/6cabbb_9f5e09ecbe8946929e8662edf7041fb8.pdf?index=true
    • https://88749095-6fd7-453f-8e8a-15b48fe47dd1.filesusr.com/ugd/e4d7df_57635954cc0940a89cfebc2310375591.pdf?index=true
    • https://uploads.strikinglycdn.com/files/28c883c3-33ef-4af2-8be9-469879217f43/git_cheat_sheet_github.pdf
    • https://s3.amazonaws.com/wisuw/are_coroners_reports_public_record_in_ohio.pdf
    • https://s3.amazonaws.com/forupokisip/19243013422.pdf
    • https://uploads.strikinglycdn.com/files/7f28cfb0-b8ba-4cf2-ab6e-1ed27ad6be74/myron_mixon_smoked_brisket_recipe.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_off0000e75a.bin
c27c7fb796d0c145e32102ad49899a1d14924777f08c87bc9896a8dd4c4e3332		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE75A 5468 bytes
font_01_sfnt_off0000f9ed.bin
5bc3079c15893466bcca319febcabcfed9b5da6e3cac7ff9fb9ebf75ad23a792		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9ED 13016 bytes

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