Malicious PDF — malware analysis report

Static analysis result for SHA-256 cee45a22fcd55680…

MALICIOUS

PDF

74.9 KB Created: 2021-03-15 04:10:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1a54b648ca9d25ccb35bcefa42761a16 SHA-1: b127418267e4f2ef0e5846405bbcb37d6038dec5 SHA-256: cee45a22fcd55680386802e2e79f0cc1d8ee949402322e713e180e2a5b9c0dc2
76 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it is a malicious SEO redirector link, disguised as a free download lure for a product. The embedded URL points to a suspicious domain, likely serving as a gateway to a phishing or malware distribution site. No scripts were extracted, but the PDF structure and embedded URI strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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/strik?utm_term=oral+b+triumph+rechargeable+toothbrush PDF link annotation
    • https://cdn.sqhk.co/vujenibolo/fujeNhd/trump_tweets_yesterday.pdfIn PDF document text
    • https://cdn.sqhk.co/rorajakura/qcxljhu/the_voice_sing_karaoke_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xozirijor/jaiKggy/call_of_duty_ground_war_sniper.pdfIn PDF document text
    • http://dhl-order.info/how_to_know_my_adobe_serial_numberrgg77.pdfIn PDF document text
    • http://trikotoria.ru/jupipqdmxo.pdfIn PDF document text
    • https://cdn.sqhk.co/torazanopuni/0Ygjtz8/tekisuk.pdfIn PDF document text
    • https://cdn.sqhk.co/kobewudojuvo/hYjqhDi/marne_taxis_1914.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1f4383f-2109-4ccb-9f78-94eb1605a42c/gy6_50cc_engine_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/york_air_conditioner_remote_control_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/wiluko.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/vedejakovubanagukugexa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2878e2e-1f02-4c61-b864-2088e67c3ff9/flowchart_software_microsoft_visio_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d913d9c1-07aa-4297-adf7-a7b2d98d8413/download_save_editor_diablo_3_ros_xbox_360.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/how_to_crochet_a_mens_hat_for_beginners_youtube.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/bibabawunipinonewuve.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/terraform_boolean_variables.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/bijotupivilem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8206b379-4262-47b3-acba-c5ed1ede56fc/what_are_rhetorical_devices_in_literature.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/nafutefebafasabizasufaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f20d20f-b324-4634-b2c6-b205dfc50eb2/how_much_do_dog_licence_cost.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_off0000e5a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A1 5516 bytes
SHA-256: ad098a6a05646364e64991f66e872c63266627b9a2e50cbcbb74a7c3c332ba0f
font_01_sfnt_off0000f825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF825 11160 bytes
SHA-256: c36fa1b085e7bf3722263b68159b1991e5dbc2aa2e97743cd46dedeed76fd708

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