Malicious PDF — malware analysis report

Static analysis result for SHA-256 4578f30f6576b0a0…

MALICIOUS

PDF

68.6 KB Created: 2021-01-29 19:01:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 73e5ee54a249b8966a25a3703ac4e374 SHA-1: 44931d8ff72d26ebf3757014dfd9e15c07e82193 SHA-256: 4578f30f6576b0a028eecd55fd630b4738f490323636397b17320be03d8a99ef
162 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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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://crophysi.ru/aws?utm_term=teatv+apk++for+smart+tv In PDF document text
    • https://cdn.sqhk.co/pifixijowoka/0jaWjfJ/89336179755.pdfIn PDF document text
    • https://cdn.sqhk.co/tofatuxurejo/jfDlgic/knife_sharpener_electric_amazon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384142/normal_5fd639a580290.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492246/normal_5fd5f069207ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449004/normal_600b928dca05e.pdfIn PDF document text
    • https://cdn.sqhk.co/mifopanikil/Nijhh1H/destiny_s_child_albums_zip.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478687/normal_5fe4c84e47504.pdfIn PDF document text
    • https://cdn.sqhk.co/jigotove/Xhigejd/tiny_hope_level_8.pdfIn PDF document text
    • https://cdn.sqhk.co/fuxuduxexi/ghrjjje/download_game_stickman_dash_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477155/normal_5fc71006e1ddb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466364/normal_600d1436d2528.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fumibomi.epizy.com/wujifegepaxijenilajo.pdfIn PDF document text
    • http://dixadenidufudu.epizy.com/mind_map_template_psd.pdfIn PDF document text
    • http://gowuzabe.epizy.com/jawidufole.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/litopakuwikomonime.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_off0000d3d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D8 5088 bytes
SHA-256: 86082e4f3f03977233af2412a3bd5e92eb043ec753fe0abdfdcec99b295a07d8
font_01_sfnt_off0000e51c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51C 9616 bytes
SHA-256: 211c46a0ebbb45e40029c027f2cf121657915b3a77cc4d39195e2ccf753999ce