Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b0ed333a09558ce…

MALICIOUS

PDF

41.2 KB Created: 2020-10-08 00:32:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 44ac5326af03b8a01545f2a1b8b50e12 SHA-1: fdaea93cd5758f6ed7a2a59fc8682faa88b50d96 SHA-256: 4b0ed333a09558cefd7ece578233d2b810153cae9017010318f6c0f61717ee7c
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://gettraff.ru/pify?keyword=the+cherry+orchard+themes+pdf In PDF document text
    • http://files.hengjieai.com/uploads/1/3/0/7/130775518/xaxedipaju_pipipi_debajabizud_zifomunexavaje.pdfIn PDF document text
    • http://pikapiva.pinnaclekidz.com/uploads/1/3/1/6/131606289/dovori.pdfIn PDF document text
    • http://files.jennyginolson.com/uploads/1/3/1/3/131384142/xigomirisi.pdfIn PDF document text
    • http://gukidu.northland300.org/uploads/1/3/0/9/130969352/85daf2fa62378fb.pdfIn PDF document text
    • https://site-1037141.mozfiles.com/files/1037141/fegowokora.pdfIn PDF document text
    • https://site-1039607.mozfiles.com/files/1039607/puralekarojolu.pdfIn PDF document text
    • https://site-1042264.mozfiles.com/files/1042264/mukibagesodanejuxomi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2600/4642/files/voxunijub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9290/9987/files/court_of_gayumars_poster.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_off00006510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6510 5416 bytes
SHA-256: 4bf86c2c0dece68b951ff1e47af639ecb8b5a4143b40dce285ed1459fcfe1558
font_01_sfnt_off00007759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7759 9644 bytes
SHA-256: c654634fe814470d9af62a640cdc364b6808222054eb386f2601793c66bad42d