Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbd4162f0748db88…

MALICIOUS

PDF

45.0 KB Created: 2020-10-01 19:54:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0050d1a0f215af84a97ba6d9b39b8f91 SHA-1: 28b880622060a187a74f8f7dddb10c86d725d43d SHA-256: fbd4162f0748db887b42cb53167bf1ec2ade6a20a79144cb9d3979daf74c9118
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/strik?keyword=malawi+assemblies+of+god+constitution+pdf In PDF document text
    • http://files.peterfosterbooks.com/uploads/1/3/2/7/132740384/vijorakuv.pdfIn PDF document text
    • http://files.technologymarketingassociates.com/uploads/1/3/1/4/131453274/4538156.pdfIn PDF document text
    • http://files.backcountrywinery.com/uploads/1/3/2/7/132740620/kedulilakurava_tizoja.pdfIn PDF document text
    • http://files.libertyppg.com/uploads/1/3/0/9/130969983/2677728.pdfIn PDF document text
    • http://files.greggrussellstudio.com/uploads/1/3/1/4/131405958/ganikabesen-kugozujelisuki.pdfIn PDF document text
    • http://dolevuvi.ashraehrc.org/uploads/1/3/1/0/131070187/rulovetudebif-wewep-pejil-kefepisekoragen.pdfIn PDF document text
    • http://files.otodea.com/uploads/1/3/0/8/130874489/9577896.pdfIn PDF document text
    • http://files.midvalleyschooloftheology.com/uploads/1/3/0/9/130969944/pazubisi_rodilopipanij.pdfIn PDF document text
    • http://files.catereedphotography.com/uploads/1/3/1/4/131483235/8529443.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/148abb1a-93b2-4c62-bf55-4c174dae41bb/romuriserupaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f1f2f3f-a4fe-4b1e-b53e-fe74bbe93e74/83663968619.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4115/1386/files/sibobemutetusibesexox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6483/5737/files/automotive_encyclopedia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/4685/8652/files/ridiwagafogobuw.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_off00007184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7184 5616 bytes
SHA-256: 9e03ec51bfc9fe6e318fbd4c8fb041334bf6bf0a6a40205d953322d03ee4734e
font_01_sfnt_off000084ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84AE 10076 bytes
SHA-256: 7b58025da2d26afc596042397b89fc3f63d76c84a88a7cb4dbb92306c2e511fe