Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a7a0ff3b992b97e…

MALICIOUS

PDF

70.8 KB Created: 2020-12-17 06:53:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: a1ef38f30c8bd814bef3fba301db0c6d SHA-1: 058ad03985348005db993931f637ab087cdde922 SHA-256: 6a7a0ff3b992b97e23775977b9707d6c115006d338da981e934485d9340634e0
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/aws?utm_term=bootstrap+close+modal+form+ajax'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://cctraff.ru/aws?utm_term=bootstrap+close+modal+form+ajax In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385635/normal_5fda5fd5a5987.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/eb6c1796-b120-4d99-a1f8-aa0ba701818c/20342307860.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/chukar_mere_man_ko_song_ming.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dcf232d-5760-48d6-959d-96589b607871/ffxiv_kefka_savage_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/bullet_bike_photo_wallpaper.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc593df27a199023ad5232a/t/5fd1f94c7c12252903f84e91/1607596365749/georgia_vs_alabama_score_2020_football.pdfIn PDF document text
    • https://s3.amazonaws.com/popagexexoza/view_your_deal_today_s_show.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b07ab70-667c-4025-986d-639b5ccbc842/gartner_siem_magic_quadrant.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df7ef56a-77c8-4043-8f7b-7a35e8eab315/repepufuvurakapogiwusuda.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/bokamereseme.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/bixesutokasigewawixejada.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/computer_games_unblocked_for_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16c2432d-fb89-4f78-b6b4-5e022f39aa3a/84234927225.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c04c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC04C 5128 bytes
SHA-256: 3b3b94b8b7bcb9ea67e75da0e3c256b65deed3f171f59fec3bd15bd84be9131a
font_01_sfnt_off0000d1d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D6 14700 bytes
SHA-256: 4f35a8162fdfc302b5c566e42b66d55c02968c9157c461fb1d97be934e7537e6
font_02_sfnt_off00010059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10059 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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