Malicious PDF — malware analysis report

Static analysis result for SHA-256 b50aad0bc636ac0e…

MALICIOUS

PDF

61.9 KB Created: 2021-02-16 04:28:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: ba2e71e52330eb59bae3e87bb52c3f6e SHA-1: 9d849717773759225c0d629dfcaa40df1a2eae09 SHA-256: b50aad0bc636ac0e681e0b4c3a19714cbd8f00c4c6a0d8dc9862918dcdca07c9
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=ashley+goyette+twitter In PDF document text
    • https://cdn.sqhk.co/fapetemiji/BhhLhi0/cross_fight_b-_daman_es_sub_indo.pdfIn PDF document text
    • https://cdn.sqhk.co/fegukajebaj/icSeIyk/streamlabs_dashboard_mobile.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484818/normal_5feb4de3c52b8.pdfIn PDF document text
    • https://cdn.sqhk.co/fagisuxupinu/hakgfY6/sizilunikatidaw.pdfIn PDF document text
    • https://cdn.sqhk.co/sadudolamom/iehgNgh/dilodaji.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451033/normal_5ff4e01c80702.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379029/normal_5fcc9960b4b5e.pdfIn PDF document text
    • https://cdn.sqhk.co/wemorapi/NjVihx3/zawekiketerakidezubub.pdfIn PDF document text
    • https://cdn.sqhk.co/jotenitix/gQyAsib/grey_and_oak_living_room_furniture_sets.pdfIn PDF document text
    • http://agreevudb.rest/gnawa_diffusion_discographiex1gas.pdfIn PDF document text
    • https://cdn.sqhk.co/gasariba/hgijSuI/45008221157.pdfIn PDF document text
    • https://cdn.sqhk.co/kurafuso/dzijJ0A/zoseteladafuradu.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/sojuravewi/longman_academic_writing_series_1.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/poruzenofefazopitagixo.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/salesforce_developer_guide_apex.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/98165713185.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/trastornos_de_ansiedad_en_adolescentes.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_off0000b8eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8EB 4920 bytes
SHA-256: 82a9c66e04e61ba62b0dfedc582f532c9dcdfaa9d4ed333c3eee5c2cb40056a0
font_01_sfnt_off0000c9bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9BB 9556 bytes
SHA-256: 187e7793b7533cce10f43e41768e74101b525b6bcfb6f7a4b8aec0797463a2a7