Malicious PDF — malware analysis report

Static analysis result for SHA-256 4df57c02789e7b17…

MALICIOUS

PDF

69.9 KB Created: 2021-02-19 12:56:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 9f787475f2e0209f6326b5cfd3343667 SHA-1: 261ae934e91a0acee350188eae5b22c2e1fd523f SHA-256: 4df57c02789e7b17fc2b612c63fa9b6d59f587ad12f28f47a9420dbf256ca16e
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://maypoin.ru/wb?keyword=what%20is%20a%20computer%20programmer%20job%20description PDF link annotation
    • https://wumigativagulam.weebly.com/uploads/1/3/1/6/131637174/1df728cbf.pdfIn PDF document text
    • https://buvekidi.weebly.com/uploads/1/3/0/7/130775196/lisatixeme.pdfIn PDF document text
    • https://cdn.sqhk.co/puxedimuwo/5qie1oe/tennessee_titans_covid_update.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379049/normal_5fccbb947c4ad.pdfIn PDF document text
    • https://cdn.sqhk.co/fironabe/a1ddhg2/9862380027.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392218/normal_6007344ea7f7b.pdfIn PDF document text
    • https://mojikusabuja.weebly.com/uploads/1/3/5/3/135301399/ziwasejo.pdfIn PDF document text
    • https://vogitoroxubas.weebly.com/uploads/1/3/0/7/130739894/zotoxenimusamadenide.pdfIn PDF document text
    • https://cdn.sqhk.co/sodelaranu/ajjjghe/jitafisefiwigasaborin.pdfIn PDF document text
    • https://cdn.sqhk.co/sulugedako/hqJYgcj/63584554221.pdfIn PDF document text
    • https://zoxiniguve.weebly.com/uploads/1/3/4/5/134584112/4343667.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/verirejon/jojozixoxuwedurat.pdfIn PDF document text
    • http://dimegebewode.epizy.com/funajaji.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/27064088137.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/lofudetofipoxozafunewaxa.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_off0000d170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD170 5684 bytes
SHA-256: c09f2bf5d0ad72b5af56c1ea5f32793dab10b71acba6bd126ac092298069b755
font_01_sfnt_off0000e4a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A0 11240 bytes
SHA-256: d4ea3d5a2630e3ad3f77baf46e43b8a3904ae54ee54ea1450096c7b0ee9e17ed