Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d8096eb5d1b3621…

MALICIOUS

PDF

72.4 KB Created: 2021-03-02 20:40:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 71ed8928baf73cb081e7238c7d1a7ec7 SHA-1: d7a6a5efe6b27b4a82f875a92c3c4788193c8b67 SHA-256: 8d8096eb5d1b36210cb7a39982a19e3e9867ed77ab332eea8c7514d904c65e81
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content, potentially leveraging JavaScript for execution.

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
  • 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.
  • 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://crophysi.ru/123?utm_term=fifty+shades+of+grey+songs+mp4+download+pagalworld In PDF document text
    • https://static.s123-cdn-static.com/uploads/4417670/normal_6009342c42c59.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368246/normal_5fee315090cf2.pdfIn PDF document text
    • http://toxinudi.22web.org/tamil_calendar_2017.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401517/normal_5fd3cacf05673.pdfIn PDF document text
    • http://look-hotel.com/easy_piano_sheet_music_for_jingle_bell_rockkd7rk.pdfIn PDF document text
    • http://liwexun.mywebcommunity.org/53095385110.pdfIn PDF document text
    • http://swiss-gear.shop/what_are_the_6_inverse_trig_functionsljx8q.pdfIn PDF document text
    • http://ruvujagefeko.mygamesonline.org/wu_tang_clan_series_next_episode.pdfIn PDF document text
    • http://mnclassis.org/orbit_62056_vs_62061z3yxor.pdfIn PDF document text
    • http://igcopyrightclient.com/wazimosixipapuduwakaweksw7kt.pdfIn PDF document text
    • http://covid-19online.site/99940907791owfjd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gixarewujedel.atwebpages.com/76887323385.pdfIn PDF document text
    • http://rimefuvax.epizy.com/create_email_list_from_google_sheet.pdfIn PDF document text
    • http://womutefipile.epizy.com/zuwagidemig.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/xurawarereruwiveb.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_off0000d766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD766 5692 bytes
SHA-256: 8f240f68765eec9568acea4c4658ed02e5867d4c9a85b18a0f8b1ca6d1c56799
font_01_sfnt_off0000eac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC7 12624 bytes
SHA-256: 17f430c006341a2af3914ec6a9b5e40d236859f7ca9a5b9b1291a7d3b90411a7

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