Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0f37020b5bb0d4f…

MALICIOUS

PDF

73.9 KB Created: 2021-02-18 21:15:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 612f0da155e9a9cb9ac066a7d83e79cb SHA-1: e4ee38b52bd97f4016e400a5d3705880dc6e5f56 SHA-256: c0f37020b5bb0d4feb4679c3deb5518acc45fb6f43be6187e28b833e6feecc14
194 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.
  • 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/123?utm_term=call+of+duty+mobile+new+update+patch+notes In PDF document text
    • https://cdn.sqhk.co/xurinuwame/nidRPgd/67143889493.pdfIn PDF document text
    • https://cdn.sqhk.co/mibajufaneja/iiehgJG/online_equipment_auctions_texas.pdfIn PDF document text
    • https://cdn.sqhk.co/vizebika/CllUcid/10109453614.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/gjhajjR/netomowogufijapex.pdfIn PDF document text
    • http://kukushka.space/88533668452hfk8t.pdfIn PDF document text
    • https://cdn.sqhk.co/vopunokapire/dmcuih9/kannada_romantic_video_songs_for_whatsapp_status_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/ieYuK2z/wordhane_word_scramble_word_finder.pdfIn PDF document text
    • https://cdn.sqhk.co/pevelefotuve/Vz7l4hr/mezosebekoju.pdfIn PDF document text
    • https://cdn.sqhk.co/roratumopiv/jbLsEhi/ruvegalujuk.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxinugokas/jhdJjji/vitunalowevamogofofelorup.pdfIn PDF document text
    • https://cdn.sqhk.co/dedogupazib/iewzQgd/99270036690.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/popilo/harry_potter_wizards_unite_guide_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/antifaces_de_carnaval_para_nios_manualidades.pdfIn PDF document text
    • http://rezazaje.epizy.com/ct_guided_abdominal_lymph_node_biopsy.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/vcredist_2005_sp1_x86.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_off0000e25e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25E 5536 bytes
SHA-256: 221aa89d7b78a1d3f208309929aa449f17f9f16369d4ddca9ccb16042cae0fa1
font_01_sfnt_off0000f525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF525 11040 bytes
SHA-256: d1096505b9c44023aff1115019bcf0dc4becae150fc738e9d053ddb704f965d5