Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bd473f8284a7d61…

MALICIOUS

PDF

90.9 KB Created: 2021-02-27 11:13:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6806089ddce597110d8c30f080c90100 SHA-1: 172616f6a973d6f653e0fc4d33d3a56be0470e2f SHA-256: 1bd473f8284a7d61706b4bd15ef66fce24a930a99740b009272b2bc78668174e
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. The document body, though heavily obfuscated, suggests a lure related to 'Vampire Diaries' quizzes. The presence of external URIs and the link farm heuristic strongly indicate an attempt to redirect users to potentially malicious or spam-related content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://nipisod.ru/123?utm_term=vampire+diaries+quiz+season+1-8 PDF link annotation
    • http://workmonster.net/59388343393r5134.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368999/normal_601c028a0fb4a.pdfIn PDF document text
    • https://xevezuwojuko.weebly.com/uploads/1/3/0/7/130740392/8182915.pdfIn PDF document text
    • http://leftoutclub.com/144463370194esw1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425921/normal_5fea271bb7fd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384320/normal_5fe6775056bc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_60316a2e88ca1.pdfIn PDF document text
    • http://shopsupergood.site/70888986193h6vxo.pdfIn PDF document text
    • http://expo-kit.ru/7475968200vpy9f.pdfIn PDF document text
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/b5609.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/levovod/assamese_serial_xopun_title_song.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/datasheet_catalog_smd.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/62137947213.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/spectro_analytical_techniques.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/budget_spreadsheet_excel_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/82062478477.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/all_your_duty_song.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/wetadas.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/libozepikow.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_off00012849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12849 5492 bytes
SHA-256: 09c31496c6976586b3c2aaa896e418507b9a06df25e3293faedf4da4986be837
font_01_sfnt_off00013af4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AF4 10576 bytes
SHA-256: 302f641ffa7208827f9d1874ecbc34b562baa6ecfa481780ae833212a7c3b483

Open this report in the interactive analyzer, or submit your own file for analysis.