Malicious PDF — malware analysis report

Static analysis result for SHA-256 def70a7442814339…

MALICIOUS

PDF

45.3 KB Created: 2020-10-14 19:53:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 04ef2cf14f3b255848b33a999d4c9c62 SHA-1: 0e295f4e9d78494781ee7888c9ab4e1994cf2493 SHA-256: def70a7442814339177fbe5b249846923c7902de563914becbb4ad77d80ef574
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://ggtraff.ru/123?keyword=collage+making+app+download+apk In PDF document text
    • https://site-1039898.mozfiles.com/files/1039898/89884598647.pdfIn PDF document text
    • https://site-1042198.mozfiles.com/files/1042198/wigijatakitejawalevo.pdfIn PDF document text
    • https://site-1036988.mozfiles.com/files/1036988/36855598491.pdfIn PDF document text
    • https://site-1043489.mozfiles.com/files/1043489/doc_to_download_free.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/vudodapazepipux_kijemomebegax_velagokotukif.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/17d0ebd6de52.pdfIn PDF document text
    • https://loguxofe.weebly.com/uploads/1/3/0/7/130775118/8006597.pdfIn PDF document text
    • https://sesuwulot.weebly.com/uploads/1/3/1/4/131438847/1261948.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/7433093.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://uploads.strikinglycdn.com/files/c6c46def-c08e-454a-b5c2-e58f40a19636/57539340924.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55b91652-f636-4af8-8f10-2bfd8d506e59/fujar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d07f13ce-5a76-4c3d-90c0-cb31af2b169c/bedusipekuduxonufalu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8389/0850/files/49996993234.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2518/6466/files/gejajijolaxowil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/4622/8127/files/hum_tv_dramas_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c57ac26e-f614-4dc7-85c4-80b6658281e5/15298396515.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/841c0577-4e51-4a1b-9fae-04785683d9b2/68735790373.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56cc0ee4-918b-4281-bedb-a412a092d2d3/21506070942.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/070196bd-8f36-4b65-9c8d-d9d754b15939/wafejimufugojezajojimew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/416b569e-bf42-4f46-bc8b-2431867e3205/73221330680.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_off00006490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6490 4892 bytes
SHA-256: 3e6b75055e226a34ba9c84be5e841563f3113936d9f4fb054c69f8d8f9f879de
font_01_sfnt_off00007529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7529 10720 bytes
SHA-256: dff043f2e4d2966633a539ac0c483d38b621ad6379837f1a064826496883a285
font_02_sfnt_off000099d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99D6 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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