Malicious PDF — malware analysis report

Static analysis result for SHA-256 90d434def37068b6…

MALICIOUS

PDF

68.9 KB Created: 2021-02-07 18:21:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 052985e581bc72102a4b106d7eb041b5 SHA-1: fb22dfa849cfb3faa53b573bbe23d6ce2d98f191 SHA-256: 90d434def37068b63533a3ee5017a52fe1f6f60a82e88646ea48e4eadc3487fe
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/aws?utm_term=microsoft+net+framework+4.+6+filehippo In PDF document text
    • https://dijibelusubif.weebly.com/uploads/1/3/4/8/134871127/pujifote.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/bbiffhe/71984485576.pdfIn PDF document text
    • http://zupibupiju.iblogger.org/baby_doll_movie_video_song.pdfIn PDF document text
    • https://cdn.sqhk.co/navotezive/Whicia7/i_don_t_understand_animated_gif.pdfIn PDF document text
    • https://cdn.sqhk.co/vomisape/Qgdgeha/siboko.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/jfUgjeN/road_sign_no_right_turn.pdfIn PDF document text
    • https://nadusada.weebly.com/uploads/1/3/0/7/130740262/020113361520b.pdfIn PDF document text
    • https://cdn.sqhk.co/rexazileka/egjgche/50943877173.pdfIn PDF document text
    • https://cdn.sqhk.co/xenumobavun/Xhdydjd/konisaka.pdfIn PDF document text
    • https://lusimijibujadex.weebly.com/uploads/1/3/4/6/134677052/rerevub.pdfIn PDF document text
    • https://cdn.sqhk.co/vodadavubex/gj7DgfC/kisufolog.pdfIn PDF document text
    • https://cdn.sqhk.co/vebiziwob/Iigjagj/55375468542.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tugojan.rf.gd/grade_2_times_table_worksheets.pdfIn PDF document text
    • http://pujusojup.epizy.com/blank_unit_circle_template.pdfIn PDF document text
    • http://jumezezufa.rf.gd/gosivifu.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_off0000cf80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF80 5692 bytes
SHA-256: 810259183a07a6acffcdb9cfb83bce5c549d7ef7daba61aa845bafb878f9326b
font_01_sfnt_off0000e2db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DB 10528 bytes
SHA-256: 7b6097275847b62ba87b344afdb81da01b197b84ce47e04a148bd7fedff9fb8a

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