Malicious PDF — malware analysis report

Static analysis result for SHA-256 f30c9fbcbe320262…

MALICIOUS

PDF

68.4 KB Created: 2021-02-17 01:50:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 5aa166a913695809525a80ce6eb7e32b SHA-1: 45cbdc0fb7207447ea3f947e181668c70fdc3f73 SHA-256: f30c9fbcbe320262db2ea6ab48d940db061102c2ffd5cc6ece57b5e444a90a47
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wix?keyword=eternium+apk+mod+1.4.9 In PDF document text
    • https://cdn.sqhk.co/tesosunimew/ighjUif/crossword_clues_and_answers_australia.pdfIn PDF document text
    • https://nabaladeso.weebly.com/uploads/1/3/1/4/131438379/ropoti.pdfIn PDF document text
    • https://cdn.sqhk.co/rekewuneboxu/idAhhYK/jutelowe.pdfIn PDF document text
    • https://cdn.sqhk.co/vobevufubito/iic5jeY/vixik.pdfIn PDF document text
    • http://mavito.online/app_para_aprender_ingles_gratis_applebf2bd.pdfIn PDF document text
    • http://ig-copyrightnoticehelp.com/fuxebajojivekixamebofemoferlr.pdfIn PDF document text
    • http://complerbnp.com/beep_sound_effect_mp47tpsf.pdfIn PDF document text
    • http://pedalini.club/first_grade_math_word_problems_addition_and_subtractionq6kcl.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/zuses/84_charing_cross_road_book_free.pdfIn PDF document text
    • http://dakunexafabeve.epizy.com/6718848248.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/audio_song_editor_software.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/januwofobitetora.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_off0000cfb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB5 5244 bytes
SHA-256: 4cf9d8e23ade161e747d448f43e1ccc6909c102ade648a49af64c751bce8d8cd
font_01_sfnt_off0000e189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE189 10368 bytes
SHA-256: 18f509124761776c7a18d165e0e35d46fbbe71181325b66ad7127238e563b4ef