Malicious PDF — malware analysis report

Static analysis result for SHA-256 145acaa9fbe1e443…

MALICIOUS

PDF

71.4 KB Created: 2021-02-08 02:42:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f1b3034354affbf507a0cb73971e9f2c SHA-1: 8b5bf3e1ac4563ec137c1d8d3cd6e50947cc865d SHA-256: 145acaa9fbe1e4439d96587c354fd2e535b42edd5693c5c0daa1102e3d139965
170 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic and the ML_NYX_PDF_MALICIOUS classifier. The document body, though corrupted, suggests a lure related to a 'consent to medical treatment form template', aligning with phishing tactics. The presence of multiple unknown URLs further supports the malicious intent, likely to deliver a secondary payload or phish for credentials.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://yafferge.ru/wb?keyword=consent%20to%20medical%20treatment%20form%20template In PDF document text
    • http://ropikapusofune.iblogger.org/mardi_gras_mask_craft_template.pdfIn PDF document text
    • https://cdn.sqhk.co/buwowunuras/jjJ5mhg/gay_sugar_daddy_dating_apps_free.pdfIn PDF document text
    • https://cdn.sqhk.co/benadujeju/bAly1jd/72818815096.pdfIn PDF document text
    • https://cdn.sqhk.co/fafujedajir/hbjjkhy/pexubuji.pdfIn PDF document text
    • https://cdn.sqhk.co/dizoketa/hrhbijz/cod_cold_war_free_beta_xbox.pdfIn PDF document text
    • https://cdn.sqhk.co/fipimomozuk/Bjggehq/clasp_knife_phenomenon_hands.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408589/normal_5fecf2cedd7d4.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/toguvaju/christmas_in_our_hearts_lyrics_free.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/xitududusugabuzukugapoju.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxegu/knowledge_base_article_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/65893725750.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/coupon_template_powerpoint.pdfIn PDF document text
    • http://zudosikewemer.epizy.com/cruise_travel_packing_list_template.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/edit_background_graphics_powerpoint_template.pdfIn PDF document text
    • http://kewivawegimomu.epizy.com/46384164603.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_off0000dbbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBD 5208 bytes
SHA-256: 71491f331201f7f6cbf7c938c6475962161b3fc882aea0d34e54db8980e3f9d0
font_01_sfnt_off0000ed52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED52 10236 bytes
SHA-256: fc4f7818eca33bc49c73cd60892b9ccf4a8e855860384f4ca0709faa279e61f5

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