Malicious PDF — malware analysis report

Static analysis result for SHA-256 75c826d0b58c0887…

MALICIOUS

PDF

47.2 KB Created: 2020-10-25 08:29:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: c26c8925fc17b7ecce7ecd4184ac63d0 SHA-1: 0266a4d4a18f5aa07088bf2fcb01a518790f0e21 SHA-256: 75c826d0b58c0887a419e62d0a461d9894078657fa43e66453c613dd60bf8fc3
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/aws?keyword=advanced+excel+formula+pdf+file In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377377/normal_5f8aa28d57113.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382614/normal_5f8c682aa4fc1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386076/normal_5f9209762a8b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365638/normal_5f94f204534e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367633/normal_5f874920cb3d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366020/normal_5f8701837245a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379842/normal_5f93c79e417bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365656/normal_5f937a1047842.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365589/normal_5f88b0e60fb6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5f870c082402c.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/d5583.pdfIn PDF document text
    • https://suzaruluzi.weebly.com/uploads/1/3/4/4/134455671/dopupidedufi.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/e5bcd2697.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/tikinapulusaf.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/9b53ec72f.pdfIn PDF document text
    • https://nipufijupetobug.weebly.com/uploads/1/3/1/4/131482996/boduru_josadokorus_mizoketer.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/zukegaw.pdfIn PDF document text
    • https://wuwuleli.weebly.com/uploads/1/3/1/3/131398564/9528007.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000755c.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000755c.bin)
    • https://uploads.strikinglycdn.com/files/f87b0550-a423-4109-a181-608beb195e4c/22618188721.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/956bb04f-c916-4fe4-b2f1-1080f4ab641a/google_maps_overlay_for_google_earth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa714f39-0b10-4f37-839e-9d7fc85f3cea/3166270148.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1947edf9-96e7-4738-bee3-ff1296b4b49f/virib.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/the_art_of_war_book_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/sowezakowitelajagexoxiz.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/english_phonics_chart.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 extracted file (font_00_sfnt_off0000755c.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000755c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x755C 5240 bytes
SHA-256: 72af67f81aa9af1020164ca13b7de208691151b3833a9352469496d1ce938a95
font_01_sfnt_off0000872a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x872A 11240 bytes
SHA-256: 60f377214e4a079423b375799e68ab0b862ce2c61be58f8b5076174c0e1d8d17