Malicious PDF — malware analysis report

Static analysis result for SHA-256 32be4cfe040d24f4…

MALICIOUS

PDF

77.8 KB Created: 2021-03-24 04:33:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: fc518f6c57d07ba661036565d2ede822 SHA-1: 4759d658f460e9092f1fe81e7408f5bb0c844591 SHA-256: 32be4cfe040d24f45a90203dc64e5e0d2dff95b8ab0aa1d85630b40ea7f0254e
126 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of numerous embedded URLs, many pointing to disposable hosting and employing UTM parameters, suggests a link farm or phishing campaign. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards techniques used for initial access via malicious documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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 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.
  • 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://crophysi.ru/strik?utm_term=what+is+the+deep+meaning+of+the+poem+fire+and+ice PDF link annotation
    • https://rowiteruna.weebly.com/uploads/1/3/4/4/134470704/5988355.pdfIn PDF document text
    • http://kugitipozad.22web.org/25789143370.pdfIn PDF document text
    • https://cdn.sqhk.co/lubometusoz/jLQ3rJc/27442157313.pdfIn PDF document text
    • https://cdn.sqhk.co/gunakawujo/gdmgcKw/27392351013.pdfIn PDF document text
    • http://xafawotilujos.mypressonline.com/algebraic_identities_questions.pdfIn PDF document text
    • http://zawukinaloluku.sportsontheweb.net/goxebakawupilage.pdfIn PDF document text
    • https://lureriwoxefewu.weebly.com/uploads/1/3/4/5/134590368/3554228.pdfIn PDF document text
    • http://sarupunojupud.sportsontheweb.net/fitefujegubesixijodafuse.pdfIn PDF document text
    • https://cdn.sqhk.co/kajurineg/jiij10C/magic_tap_tiles_piano_edm_music_game_online.pdfIn PDF document text
    • https://cdn.sqhk.co/senuziker/djT6rif/wakivolujavetamigokagafi.pdfIn PDF document text
    • https://cdn.sqhk.co/disidudi/tcichj0/carrom_play_and_compete_online.pdfIn PDF document text
    • http://dorugatutaxovi.scienceontheweb.net/xajosatikepi.pdfIn PDF document text
    • https://dusonomikeka.weebly.com/uploads/1/3/2/6/132695238/bugira.pdfIn PDF document text
    • http://nekuwagibajese.getenjoyment.net/lakoxubifikibunujatimerin.pdfIn PDF document text
    • https://pawimugonuri.weebly.com/uploads/1/3/4/8/134882006/1e6a57821.pdfIn PDF document text
    • https://vujebitaj.weebly.com/uploads/1/3/4/7/134759162/9917078.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sefogubijisep.epizy.com/formation_nutritionniste_par_correspondance.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/wefev.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/94227103510.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/define_billing_cycle_report.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/zemavipewane.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/jurassic_park_flute_sheet_music.pdfIn PDF document text
    • http://xegefonupekowa.epizy.com/86598860469.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e88c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88C 1528 bytes
SHA-256: 906312b206573a369fdf05f2d58baf7f592464f3d990fc278d772a9a6a9aa3be
font_01_sfnt_off0000f052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF052 5552 bytes
SHA-256: fbf603baea7e0ce81d88974149600aac9cc56bc8cc102103ee9c3d34115bbd11
font_02_sfnt_off0001031a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031A 10980 bytes
SHA-256: eb482aa9f795f32b42e991a86c2f6a2f26bd45ddef15724ecac5617eeb6a745e

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