Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdff207d64d081a7…

MALICIOUS

PDF

80.2 KB Created: 2021-06-01 06:53:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: ebd8cf392f3e7fd9eacda7812f89c91b SHA-1: cc7fbae4f9c7ec9c63a0d8e10528752f611d82dd SHA-256: fdff207d64d081a7f81abce74fbaee10fd1d59e1037a3eb4d3da80c22dd80170
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm designed to redirect users. The presence of a 'utm_term' parameter in one of the URLs indicates a phishing or scam-related lure, specifically targeting users searching for 'tiktok lite mod apk 2021'. No scripts were extracted, but the PDF structure and embedded links strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pixomot.ru/pbw?utm_term=tiktok+lite+mod+apk+2021 PDF link annotation
    • https://mewifukemi.weebly.com/uploads/1/3/4/7/134764424/17ca6c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479436/normal_604234d9d3608.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497348/normal_5fffbf5921471.pdfIn PDF document text
    • https://wubinuju.weebly.com/uploads/1/3/4/6/134642725/lomesuzizof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375194/normal_60226ed6c854f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462696/normal_5fe14450800ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409098/normal_5ffc698f31030.pdfIn PDF document text
    • https://goluluvofa.weebly.com/uploads/1/3/2/7/132712214/kukasugomediki.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480736/normal_600265296aad2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377113/normal_5ffde928dc71b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404969/normal_6036118dafdf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391335/normal_6030f61f70495.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389365/normal_6009d1c971464.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447093/normal_5fdbfd492de7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369149/normal_604e5324745e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386091/normal_60597f1902a04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391317/normal_601097697a1ab.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4369162/normal_60b557a271abe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407804/normal_5fd11c0babb01.pdfIn PDF document text
    • https://xozuvopirabupo.weebly.com/uploads/1/3/4/5/134599715/gezagefekeka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505837/normal_5fda83cc443e3.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
    • http://rasovuxosew.pbworks.com/w/file/fetch/144431622/39653299953.pdfIn PDF document text
    • http://xosufixemuf.pbworks.com/f/convertir_un_archivo_de_word_a_online_gratis.pdfIn PDF document text
    • http://rujuboxu.pbworks.com/f/lulotire.pdfIn PDF document text
    • http://muxopal.pbworks.com/w/file/fetch/144443139/where_to_buy_harpers_magazine.pdfIn PDF document text
    • http://xuresasadox.pbworks.com/f/first_aid_cases_for_the_usmle_step_1_4th_edition_free.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_off0000ec8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8D 4852 bytes
SHA-256: 4a94fd0c9a18afb116cfc8307e55faef165345534d6fe6383366d58bd45caf61
font_01_sfnt_off0000fd15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD15 11976 bytes
SHA-256: 14adc6ba154c30009684bf287da8163cc4529c5aec74b520ce2282b8258d3d8f
font_02_sfnt_off00012488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12488 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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