Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ade30b14ab314db…

MALICIOUS

PDF

79.0 KB Created: 2021-03-20 08:40:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 578047c0a26b6765f7e36c5521d8cb48 SHA-1: 9e0959d065314c136788342a9e0aad507d62e3ac SHA-256: 5ade30b14ab314dbf6d007ef3de06ae9186ade5af1be113c1244543c806b825d
184 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics, including a critical alert for a PDF redirector link pointing to 'crophysi.ru'. The ML classifier also strongly flagged the PDF. The embedded URL heuristic confirms the presence of links within the document, which are likely used to lure victims to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/award?keyword=starch+based+bioplastic+pdf In PDF document text
    • https://dovabobu.weebly.com/uploads/1/3/5/9/135978637/xarosumetaruwo.pdfIn PDF document text
    • https://gibitiwatu.weebly.com/uploads/1/3/0/7/130776060/7424739.pdfIn PDF document text
    • https://cdn.sqhk.co/vopupevomate/tigcge7/miniature_painting_techniques_black.pdfIn PDF document text
    • https://cdn.sqhk.co/ravawiku/VFE3oXR/50762568769.pdfIn PDF document text
    • https://korareledanos.weebly.com/uploads/1/3/4/3/134385748/pomij.pdfIn PDF document text
    • https://cdn.sqhk.co/dojozafo/ihaB0kp/balloon_dog_costume_spirit.pdfIn PDF document text
    • https://cdn.sqhk.co/kadunila/cmrAnhd/final_year_texas_franchise_tax_report.pdfIn PDF document text
    • https://cdn.sqhk.co/zabitokepum/bgcjchf/gibatemekalisezaxikemu.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/jhgf7hc/chess_tactics_puzzles_online.pdfIn PDF document text
    • https://cdn.sqhk.co/rozopebak/CTAijge/background_gradient_android_studio.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/55160885340.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/7806538788.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ca7348d-facb-46d4-b402-d4ced255b14d/cosmos_neil_degrasse_tyson_capitulo_13.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/love_hate_quotes_wallpaper.pdfIn PDF document text
    • https://9e7b01ce-91ce-414a-93c5-ade8df4b7359.filesusr.com/ugd/cfbfd2_7c68ae25b34f4b67bdf0b139569d47e7.pdf?index=trueIn PDF document text
    • https://13adc596-845f-4f4a-b539-e2c04a0a4b5a.filesusr.com/ugd/6e2da7_c423bbbd8a6f4df3ab0841832996a2ce.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kosamupim/raduvofuwufokaguju.pdfIn PDF document text
    • https://b7b9a0d4-d71d-433a-9dbc-8293b1c729aa.filesusr.com/ugd/979434_669247bf4bb642259071395db3a8dda9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bed0f5f-bd47-440c-a5cd-d9ac3e07e02f/ernest_hemingway_son_death.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5629e585-218b-4155-9393-6adf4f6a5b6c/can_you_buy_and_sell_stocks_on_yahoo_finance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/604679fb-f9fa-4391-8054-66ad5ac47d49/eva_luna_novela_completa_captulo_1.pdfIn PDF document text
    • https://48e6b720-b653-4920-beb0-7ef171ab6ab9.filesusr.com/ugd/d9d1f5_278a155d426444db88f6907fe005eb19.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba64f73a-b3d6-4b94-8590-4947066cc862/guxusowikug.pdfIn 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_off0000f6d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D6 5488 bytes
SHA-256: 7e163e1ad351e0bf013c38d741767f9aec56033c5791eb07fa5fb2fe5f6be649
font_01_sfnt_off0001096e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1096E 10844 bytes
SHA-256: 982cf3e5990a2612ad1fbc3c245920934204154ec544efe0abd165165867952b