Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5c97ed844ff8cad…

MALICIOUS

PDF

65.2 KB Created: 2020-10-08 18:14:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 1cb937863509e22daa3e3833098ece92 SHA-1: 480acc2478f1262f17c47cbf6c404c129de4c4ea SHA-256: e5c97ed844ff8cad8bd8a264d6841ef4a5ccdfe67c744d73a99eb7018fcdd19b
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://ttraff.me/pify?keyword=set+size+of+vector+c%252B%252B In PDF document text
    • http://files.esoterikosparanormal.com/uploads/1/3/0/8/130814516/pepiw.pdfIn PDF document text
    • http://files.newmilfordpilates.com/uploads/1/3/2/7/132741064/dalabixuvu_xujufanom.pdfIn PDF document text
    • http://files.manalily.com/uploads/1/3/1/4/131406086/6634537.pdfIn PDF document text
    • https://site-1036743.mozfiles.com/files/1036743/27410224018.pdfIn PDF document text
    • https://site-1037180.mozfiles.com/files/1037180/90778415904.pdfIn PDF document text
    • https://site-1039356.mozfiles.com/files/1039356/karapokevupexi.pdfIn PDF document text
    • https://site-1042198.mozfiles.com/files/1042198/98119059277.pdfIn PDF document text
    • http://welerifan.pressurewashingtorrance.com/uploads/1/3/0/8/130874388/a9eb97df2585f.pdfIn PDF document text
    • http://koxigaj.authorcaroldevine.com/uploads/1/3/1/4/131483281/torekenexus.pdfIn PDF document text
    • http://kizorofud.sciartmagazine.com/uploads/1/3/2/6/132682735/topuferivataji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5122/0134/files/o_captain_my_captain_analysis_by_stanza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9330/3204/files/student_answer_service.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3224/7445/files/80360612775.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5042/6787/files/windows_10_store_cracked_apps.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7224/2342/files/20629591719.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA892 4528 bytes
SHA-256: 4bc8cbaac626ed7387e0e04943e5c87d1a1183134ef091575ed8ba57339d2e28
font_01_sfnt_off0000b811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB811 15304 bytes
SHA-256: 12131b2faa389816a983fed0f24e4ccf2c65c14be0e2752b03cfeeba8aa8f83f
font_02_sfnt_off0000e7d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D1 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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