Malicious PDF — malware analysis report

Static analysis result for SHA-256 20aab31987858d29…

MALICIOUS

PDF

50.8 KB Created: 2020-11-07 00:52:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 625852285d82c3dac1c3c1772dd7fc8f SHA-1: 85b31740e9a5411f89f3e8e5fbcd5f34f6be6f42 SHA-256: 20aab31987858d29226e2f9dc2ec6cafee571c46c782405406da4bcd7d70bfaf
132 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffine.ru/aws?keyword=download+backyard+revolution+ebook+pdf In PDF document text
    • https://titawijuneve.weebly.com/uploads/1/3/4/0/134012454/mulidezasite.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/lulodegoner.pdfIn PDF document text
    • https://fagisidide.weebly.com/uploads/1/3/2/6/132682833/digamow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379971/normal_5f8bc3c018d4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415768/normal_5f951f2ca244b.pdfIn PDF document text
    • https://tusukufuduma.weebly.com/uploads/1/3/4/4/134458322/6126528.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/bozezofogizixur-batexomuf.pdfIn PDF document text
    • https://lejonajij.weebly.com/uploads/1/3/4/6/134651266/negotakifixiguledam.pdfIn PDF document text
    • https://fumadutukit.weebly.com/uploads/1/3/1/4/131437402/fedovil-venadareri-vumuwilinira.pdfIn PDF document text
    • https://kulilopoxi.weebly.com/uploads/1/3/4/3/134375859/lupazawimadaniriv.pdfIn PDF document text
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/4401886.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/8ef98e56-fd7f-4a65-83bc-d96d08a653f9/7702411081.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/bautagebuch_411.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/pudezixemev.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_off00007806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7806 5428 bytes
SHA-256: bf0f1aa6d34a3b1d611b34f0fcdf9e7c773559941862fc6c160759642ec30ba5
font_01_sfnt_off00008aad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AAD 15792 bytes
SHA-256: edee9146a839cdf5a9d32e478bebe344253581ef8e0fd9b83e2ecbc886d2bcad