Malicious PDF — malware analysis report

Static analysis result for SHA-256 16ef554b396ba60e…

MALICIOUS

PDF

68.6 KB Created: 2021-02-12 18:13:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 3b71b247f897374b7b71d9af826a6ecc SHA-1: b39c7489d3e0453acd91ab4a181bd15903a8c025 SHA-256: 16ef554b396ba60e136a68c45280093b1b1b6e7490bfb15e5ff917b350451f6e
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://bologen.ru/wb?keyword=android%209%20huawei%20mate%2010%20lite PDF link annotation
    • https://cdn.sqhk.co/xemugugafot/egdiaTH/bach_eternal_canon.pdfIn PDF document text
    • https://cdn.sqhk.co/mowaxuso/jWjh3u2/barcode_scanner_app_download_for_android.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/zuxime/esc_guidelines_stemi_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/chennai_express_train_song_dialogues.pdfIn PDF document text
    • https://s3.amazonaws.com/wolawatin/amnesia_memories_steam_guide.pdfIn PDF document text
    • http://bugifub.epizy.com/trrs_iphone_to_android_adapter.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/15584741089.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/kemebuzekeraxegogabowen.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/vehicle_information_app_government.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/76564213867.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/rabudosafotaritesoxazo.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/2._dereceden_denklemler_aritmetik_ortalama_forml.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/94758580144.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/chirugali_veechene_naa_song.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/beldanga_to_sealdah_train_information.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_off0000ce69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE69 5320 bytes
SHA-256: 78186076dc043dbf5a9c1f26e83d9e2011bcd98c00de558182e0076866a53de6
font_01_sfnt_off0000e06a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06A 10992 bytes
SHA-256: c7701d85779a09c6c4a1207771cb60a5cc372af7f6a4091137081a3149e8b154