Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f2247e06b8b93c9…

MALICIOUS

PDF

75.0 KB Created: 2021-02-21 19:42:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 26b9824c3610358b34c9aebb107c0adb SHA-1: bfa012d4dc99ff150852f29fbfc590414dc559ff SHA-256: 8f2247e06b8b93c95169eddb9d121811146d252bcb20d1f38b24907f7325eaa3
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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/wb?keyword=the%20book%20thief%20part%202%20short%20summary In PDF document text
    • https://feposejixadolo.weebly.com/uploads/1/3/4/7/134744373/a5039.pdfIn PDF document text
    • https://cdn.sqhk.co/demexadol/icGpkrB/cat_running_wheel_funny.pdfIn PDF document text
    • https://cdn.sqhk.co/vabalogu/k3jc7he/steven_universe_song_lyrics_do_it_for_her.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391634/normal_6014e1246f97e.pdfIn PDF document text
    • https://cdn.sqhk.co/kululojilo/fmgiQij/dominoes_game_download_free.pdfIn PDF document text
    • https://zipawesijapa.weebly.com/uploads/1/3/4/4/134494223/gisadix-sadofipesoti-vubinuwaxen-vokixiv.pdfIn PDF document text
    • https://cdn.sqhk.co/kolokejo/jeHibjg/dinosaur_wallpaper_iphone_xr_hd.pdfIn PDF document text
    • https://cdn.sqhk.co/resilano/baCdAru/25617115956.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465267/normal_60266523da0bc.pdfIn PDF document text
    • https://fufaguda.weebly.com/uploads/1/3/0/7/130739251/foxoratebi.pdfIn PDF document text
    • https://cdn.sqhk.co/sarokuneti/KjaljcS/bloom_s_taxonomy_psychomotor_verbs_list.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/qsjfFie/limp_bizkit_sanitarium_metallica_cover.pdfIn PDF document text
    • https://kosonijuzar.weebly.com/uploads/1/3/5/9/135974682/1146156.pdfIn PDF document text
    • https://guzepebizosi.weebly.com/uploads/1/3/4/8/134880367/5ba95b8ffb1.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/waxapoz/ctet_result_2019_date_answer_key.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_off0000e924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE924 5496 bytes
SHA-256: 09ee3f797e1b1d9a68bd9c3fb114b137dd623007175a11bb51bdb8df63b194d0
font_01_sfnt_off0000fba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA9 10544 bytes
SHA-256: ac9565af1cc63ce5d7fab6a39bac34a52a72a73e5ec68b23d31930733a3f31dd