Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4b960ead077fa3d…

MALICIOUS

PDF

43.4 KB Created: 2020-10-26 21:31:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 3019cf2174d2fd3bb72fd7ebff87daa3 SHA-1: fe003bf421d717b918c5923a17e327798d30b132 SHA-256: a4b960ead077fa3d1a192051a26aebf304ede47bd47f4bcd1e097be21f339e3a
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=about+face+pdf+hackworth In PDF document text
    • https://dujopoda.weebly.com/uploads/1/3/0/7/130739119/petujeme-befefasu-bijov.pdfIn PDF document text
    • https://viwijivawapel.weebly.com/uploads/1/3/4/4/134492302/dizibavutenuwiwa.pdfIn PDF document text
    • https://kakawugob.weebly.com/uploads/1/3/0/9/130969990/922065.pdfIn PDF document text
    • https://sonuboguf.weebly.com/uploads/1/3/4/3/134310015/zukoxupu.pdfIn PDF document text
    • https://defelewag.weebly.com/uploads/1/3/2/7/132741475/gaguwa_vupazotekizote.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387589/normal_5f8ee27093a47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f86f444355d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369161/normal_5f92a4a92c908.pdfIn PDF document text
    • https://xikosenazegan.weebly.com/uploads/1/3/0/7/130739601/mutesoriwowina.pdfIn PDF document text
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/fd57c.pdfIn PDF document text
    • https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/5901192.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413848/normal_5f96324ed3133.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390074/normal_5f910b9681ab2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377902/normal_5f8c1335b51f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380674/normal_5f8c46078b142.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9e6830d-a7c1-4df0-8158-5d80f59f4bbd/probability_pitman_ebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65f31b61-ae34-47ab-93d0-d5afd6432676/piputuvavurakevi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86c01e9c-5712-40e7-ba20-fed23cddaf88/99945579955.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee194754-26c6-4784-9c2f-fbe142e8694d/juvizisowuxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/9741/9679/files/wagaxumifatojaxiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4522/2550/files/role_of_chorus_in_oedipus_rex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8907/7440/files/gagotuzoxatodagu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4460/4584/files/jitefuwadi.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_off00006b2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B2F 5320 bytes
SHA-256: a4b9b46006c37b6662ac2d2e266cc95adf29beae0c649ea560e25e156b1100ce
font_01_sfnt_off00007d46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D46 10184 bytes
SHA-256: b31d943b37bd1f90fe0817dd23d20d48a18aef791b9162fb1b0aeff2e2569528