Malicious PDF — malware analysis report

Static analysis result for SHA-256 23af1c83181d307c…

MALICIOUS

PDF

72.0 KB Created: 2021-02-28 05:04:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: f627052403b8bfa02768d14e5ddbad2f SHA-1: de65d10a0f97aa717c194be76fbe8a59a149eae7 SHA-256: 23af1c83181d307ce12c20f117c5bad95f7a0bc469622ff2a318f86b660d9702
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/wix?keyword=samsung+washing+machine+front+load+manual In PDF document text
    • https://cdn.sqhk.co/rogevuzazi/6XhfBih/61793500513.pdfIn PDF document text
    • https://mifopezuzata.weebly.com/uploads/1/3/4/4/134484464/b586cb5e68016.pdfIn PDF document text
    • https://cdn.sqhk.co/wibononuve/2jhPhdb/build_a_website_without_using_a_website_builder.pdfIn PDF document text
    • https://cdn.sqhk.co/pugepavofu/eiigghc/color_ball_blast.pdfIn PDF document text
    • https://funofumid.weebly.com/uploads/1/3/4/8/134886651/2867524.pdfIn PDF document text
    • http://fexevewuli.mypressonline.com/4967038468.pdfIn PDF document text
    • https://cdn.sqhk.co/jodariwem/ZjiojiN/degujonefafizomuzebod.pdfIn PDF document text
    • https://lusogovo.weebly.com/uploads/1/3/4/3/134358567/poramebov_vakazitisunop.pdfIn PDF document text
    • https://karezolakep.weebly.com/uploads/1/3/1/3/131398125/maledurimo.pdfIn PDF document text
    • https://rosanibo.weebly.com/uploads/1/3/4/8/134873488/055b7.pdfIn PDF document text
    • https://xabanovodo.weebly.com/uploads/1/3/0/7/130739860/tidararan_gigun.pdfIn PDF document text
    • https://cdn.sqhk.co/gadewekunel/ShaFJhe/24292096744.pdfIn PDF document text
    • https://juludonidodag.weebly.com/uploads/1/3/4/7/134706402/2245661.pdfIn PDF document text
    • https://rituzanasalu.weebly.com/uploads/1/3/4/7/134718781/9a9a8.pdfIn PDF document text
    • https://kisuvali.weebly.com/uploads/1/3/1/1/131163683/32c988efda.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/patilawasu/63884686124.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/kiss_the_rain_flute_sheet_music_easy.pdfIn PDF document text
    • https://s3.amazonaws.com/nasitevu/40418024330.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_off0000da59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA59 5628 bytes
SHA-256: 7040a6342babcbc51af0a0710b149e372e11657d5ceaef2edd289a77b7a373a9
font_01_sfnt_off0000ed62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED62 11280 bytes
SHA-256: adde7c01a28f1edd1109710a3890c572f2d652ffdd0b41bc9bc1c625b5bd0df5

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