Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c8d04d2b0857b21…

MALICIOUS

PDF

69.2 KB Created: 2021-01-27 09:49:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: ea5d556f7115dbf0af9bf2f71c364ae1 SHA-1: 64235bbcc7ebcaffa278a8364e50c31eb101e8ec SHA-256: 9c8d04d2b0857b21a8a8133883f02606d51d685aca7f241ce3af3575a4761ea0
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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.
  • 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=sonic.%20exe%20wallpaper%20android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4402932/normal_600d45960d9e9.pdfIn PDF document text
    • http://xtw2.club/nuletezinolifup2jtpy.pdfIn PDF document text
    • http://varietystore.website/off_road_racing_schedulewxvew.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420431/normal_5fef43a850984.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476294/normal_5ffb6bea3079b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366389/normal_60075dea418a9.pdfIn PDF document text
    • http://idclick.cash/26450399927dar3z.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408460/normal_5fc61e651a4e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427268/normal_5fcb0c70d2a50.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409420/normal_5fc9b03d4734f.pdfIn PDF document text
    • http://summer-italy.fun/super_archery_shooting_target_shoot_rescue_cuttere8upt.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/bubisifapagefe/81003353204.pdfIn PDF document text
    • http://jolavewavesuj.epizy.com/tb_meningitis_treatment.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/chirugali_veechene_naa_song.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/tojigasedadixafelivix.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_off0000d04f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD04F 5184 bytes
SHA-256: e36e4a654626b98d79a753bcc61d094bdeca0f28c7234692c5b389a6265a42a4
font_01_sfnt_off0000e222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE222 11968 bytes
SHA-256: b4ac5236281012e91b6ad90a34548dd0a0771b49a8d78e075a78972a8be9248d