Malicious PDF — malware analysis report

Static analysis result for SHA-256 5321f7a381dea5fe…

MALICIOUS

PDF

70.8 KB Created: 2021-01-19 23:53:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: fa7df0a55113893cbcaab961ec1a88a1 SHA-1: b89b47db514fdeeee179edef095a122f16db061a SHA-256: 5321f7a381dea5fec42d0de4ee44b0ff858267e25c59fa2a82261f3ef9dd3943
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm designed to attract traffic. One critical heuristic indicates a link to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://cctraff.ru/123?utm_term=netgear+wnce3001+manuale+utente In PDF document text
    • https://magalezofutik.weebly.com/uploads/1/3/4/5/134599277/bilegepuw_vibexupin_zukowinepetusa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366666/normal_5fca4590adee8.pdfIn PDF document text
    • http://wubegewefek.iblogger.org/3434774398.pdfIn PDF document text
    • https://befetoxakotupo.weebly.com/uploads/1/3/0/7/130738956/4814840.pdfIn PDF document text
    • https://viradigoposexa.weebly.com/uploads/1/3/4/3/134383508/8306437.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378160/normal_5fdbdd22e9af9.pdfIn PDF document text
    • https://lefexaro.weebly.com/uploads/1/3/5/3/135324439/tekijuva.pdfIn PDF document text
    • https://menanolunum.weebly.com/uploads/1/3/4/7/134754058/5350522.pdfIn PDF document text
    • https://sopesurikef.weebly.com/uploads/1/3/5/3/135317881/jiruzomoruxun.pdfIn PDF document text
    • https://nidiladidubupa.weebly.com/uploads/1/3/4/7/134753920/faee2c98.pdfIn PDF document text
    • https://site-1168358.mozfiles.com/files/1168358/driver_canon_canoscan_lide_220.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/bexolamabad/vijayawada_lo_velasina_durgamma_naa_songs.pdfIn PDF document text
    • http://mulukamuzadesew.epizy.com/apa_references_format_article.pdfIn PDF document text
    • http://vutakeba.epizy.com/diverticular_disease_guidelines_2017.pdfIn PDF document text
    • http://posugez.epizy.com/yiruma_chaconne_music_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/noniniwodepawisifafig.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_off0000d7c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C7 5360 bytes
SHA-256: 87180879200f8fa9c7b58dd3f2262282d62dee399d3502ed0992016f9818e35d
font_01_sfnt_off0000ea0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0F 10604 bytes
SHA-256: 127892b2b46b2d6e07263403f9fe0c8dd4fe5a14716cd13cef3a8cc5a5f89035

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