Malicious PDF — malware analysis report

Static analysis result for SHA-256 8753d4bb5c72aa8e…

MALICIOUS

PDF

77.1 KB Created: 2021-02-21 07:51:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a67ed8b8580714a257385de59e09ad49 SHA-1: 91bdc9b04e61fa1f6b602e229c333abdc57823f2 SHA-256: 8753d4bb5c72aa8ef759febe2391ac5a54b4ad150f5fb811bf216dbdda790ce4
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan and an ML classifier indicating maliciousness. It contains a large number of external links, characteristic of a link farm, with the primary URL being a lure for a book summary. The presence of these links suggests an attempt to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://druttle.ru/strik?utm_term=resumen+corto+de+la+obra+la+culpa+es+de+la+vaca+pdf PDF link annotation
    • https://cdn.sqhk.co/fepogosu/Qjdndha/blaze_and_the_monster_machines_cake_toppers.pdfIn PDF document text
    • https://cdn.sqhk.co/tivuzofep/aiaMiaU/cannonball_run_2_cars.pdfIn PDF document text
    • https://cdn.sqhk.co/tuzevawu/JRNpijB/war_and_magic_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/rinezodoniga/gL8ihO6/zekibozaxagibumusin.pdfIn PDF document text
    • https://cdn.sqhk.co/goganededem/fje7IuU/pro_bowling_tv_online.pdfIn PDF document text
    • https://cdn.sqhk.co/leporolino/eLgjxCX/imagine_dragons_demons_letra_traducao.pdfIn PDF document text
    • https://cdn.sqhk.co/feletitami/Podmidn/flip_jump_stack_apk.pdfIn PDF document text
    • https://niromovikusuzu.weebly.com/uploads/1/3/4/6/134651616/5426330.pdfIn PDF document text
    • https://cdn.sqhk.co/jenotonolo/hg1iejg/4k_ultra_hd_wallpapers_for_pc_gaming.pdfIn PDF document text
    • https://cdn.sqhk.co/fefamuve/2hjcanp/tobokegakegixaweroreb.pdfIn PDF document text
    • https://cdn.sqhk.co/bomumuxa/hhjjiaq/round_corner_visiting_card_mockup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuzuxoluzetirig.rf.gd/lufisokexav.pdfIn PDF document text
    • http://tugoxejemikoze.epizy.com/making_new_words_worksheets.pdfIn PDF document text
    • http://mokupemoraworal.epizy.com/industrial_electronics_objective_questions_and_answers.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_off0000edcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCF 5508 bytes
SHA-256: 0279055f1303e03a19c4d77da7af62fb524f8abddb011d57b5d1b9d62be4c4bd
font_01_sfnt_off00010078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10078 11320 bytes
SHA-256: c2a8221034fc2e20d659d3d24fffbfb418b59415776f04aafeddc61ad0aca030

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