Malicious PDF — malware analysis report

Static analysis result for SHA-256 677ef977e6977c7a…

MALICIOUS

PDF

82.0 KB Created: 2021-02-26 03:44:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: d2949118307585d17eb22f9963f60a50 SHA-1: b8da17f6bee12e85827041d8e3f9654c893bd0a3 SHA-256: 677ef977e6977c7ae8314c1a0eb78155eb29448c2e60fc5b00bbc4b373a2f230
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/award?keyword=cuanto+mide+un+ni%25C3%25B1o+de+1+a%25C3%25B1o+3+meses In PDF document text
    • https://cdn.sqhk.co/dosakupu/Lic0ge5/stickman_the_fight_apk_mod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474736/normal_5ffcf449e0e18.pdfIn PDF document text
    • https://zefinefan.weebly.com/uploads/1/3/2/8/132816158/559732.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382790/normal_6017c2dca2a04.pdfIn PDF document text
    • https://zasiranel.weebly.com/uploads/1/3/4/5/134507270/6056753.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383160/normal_60265b7f2e2b0.pdfIn PDF document text
    • http://jsexj.fun/the_food_vocabulary_word_game_answers_1731fv7c.pdfIn PDF document text
    • http://onatural.space/go_way_from_my_window_sheet_music36wrz.pdfIn PDF document text
    • https://fuxexitir.weebly.com/uploads/1/3/4/0/134098624/2987407.pdfIn PDF document text
    • http://fuzuxozexuvir.22web.org/juvunelagokikidizo.pdfIn PDF document text
    • https://kezunegewekal.weebly.com/uploads/1/3/1/4/131483031/lobutuwim.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467601/normal_5fe5bac341d28.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490366/normal_5fdfb6e429214.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://taravelimaliliz.rf.gd/logitech_z623_2.1_pc_speakers_review.pdfIn PDF document text
    • http://vofolosozoz.epizy.com/15421851244.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_off00010297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10297 5176 bytes
SHA-256: ccb8087f6e9e565b90cd0da18d314d20796a1ddc5e8fcff17057af62e8f807d4
font_01_sfnt_off000113e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E2 11412 bytes
SHA-256: 4229e1f1d3585d77f1993aa7eb19b4c325ac61c54662b8860d706379acda336c