Malicious PDF — malware analysis report

Static analysis result for SHA-256 72e7f657e648fad9…

MALICIOUS

PDF

77.2 KB Created: 2021-03-26 08:35:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1be9633e6e9a02e107c41bbeed7e88c1 SHA-1: 53b9472018c69666184e698031fe2828fcce9613 SHA-256: 72e7f657e648fad9e1516bcb80a20d72b014025d7a3573e051fd457694f228aa
136 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI and an SEO redirector link pointing to 'jottigo.ru' suggests a phishing lure, likely attempting to trick users into downloading further malware or providing sensitive information. The document body, though heavily obfuscated, contains strings related to file conversion tools, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jottigo.ru/123?utm_term=any+audio+converter++filehippo PDF link annotation
    • https://cdn.sqhk.co/dejuxafe/ighj9ic/21597715459.pdfIn PDF document text
    • https://cdn.sqhk.co/xotosobupis/hc6thbS/luxorebib.pdfIn PDF document text
    • https://cdn.sqhk.co/fapewakuw/lAhgicV/cruise_parking_dania_beach.pdfIn PDF document text
    • https://cdn.sqhk.co/fuzokikili/Figboia/milopulimugujeborov.pdfIn PDF document text
    • https://cdn.sqhk.co/jawutuwek/dCejdwI/bexogezakukewumisepe.pdfIn PDF document text
    • https://cdn.sqhk.co/pofifarim/5gisTAJ/sovezupebojul.pdfIn PDF document text
    • https://cdn.sqhk.co/xajevedu/g70ZL6I/japanese_anti_aircraft_cruiser.pdfIn PDF document text
    • https://cdn.sqhk.co/difanemifal/IViBjfg/gun_shot_mp3_ringtone_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xonivozew/gij1hx8/ketabezodiwutu.pdfIn PDF document text
    • https://cdn.sqhk.co/jotenitix/haiibTR/60688254301.pdfIn PDF document text
    • https://cdn.sqhk.co/banibudofe/6gfPicA/zetaketelabenekoto.pdfIn PDF document text
    • https://cdn.sqhk.co/dewufidabo/idVhgFk/jesitabavikupivorefu.pdfIn PDF document text
    • https://cdn.sqhk.co/naziwixolagu/8ieqtjD/ketososejokogufeminezer.pdfIn PDF document text
    • https://cdn.sqhk.co/masamiwe/jhgeigz/at_t_digital_life_security_cameras.pdfIn PDF document text
    • https://cdn.sqhk.co/kasavakujosi/11xhjjb/56915678540.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/widofafane/where_to_get_my_sewing_machine_serviced_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/50026961421.pdfIn PDF document text
    • http://xizirali.epizy.com/how_to_use_self_timer_on_nikon_d3400.pdfIn PDF document text
    • http://vumopigaw.epizy.com/77636753497.pdfIn PDF document text
    • http://runoxujozu.rf.gd/bullet_force_apk_obb_file.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/rosogoporikepipepe.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_off0000f047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF047 5216 bytes
SHA-256: 592a86f45c9966ea6a32b42d76ab8ca47a667c26cff0d617cd62f775c1fdfa0f
font_01_sfnt_off00010214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10214 11028 bytes
SHA-256: c2d5edac4c43d15e75c845950b5821414deefa21d3784b467e4ca736fdec5580

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