Malicious PDF — malware analysis report

Static analysis result for SHA-256 9300128d19eb23e9…

MALICIOUS

PDF

65.7 KB Created: 2020-11-20 09:17:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: abf3880f8e080de5157c6040bfc738cd SHA-1: e1cb3051e83a96af92f689f9a12175bd53c04e8a SHA-256: 9300128d19eb23e9aec4efe787df2b94c1b066769555cf3634c2136f6ce5288b
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to disposable hosting services and are likely part of a link farm designed to distribute malicious content or phish users. One URL is explicitly identified as a malicious redirector. The ClamAV detection and ML classifier further support its malicious nature, indicating it's likely a phishing or trojan distribution mechanism.

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=joe+list+comedy+wife In PDF document text
    • https://lujalidulosegex.weebly.com/uploads/1/3/4/3/134369289/duvofuga_nusudegan_fiwelif_pixegabajowiwum.pdfIn PDF document text
    • https://sidugavumudoriz.weebly.com/uploads/1/3/4/9/134902227/dadawovagemelup-bipebatod-nezutemej.pdfIn PDF document text
    • https://nafuxiba.weebly.com/uploads/1/3/4/0/134097784/xapawuxazoliwux_xowagobefuvow_pexoso_xuwux.pdfIn PDF document text
    • https://wesafave.weebly.com/uploads/1/3/4/3/134307961/565009.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421466/normal_5fb454f10f822.pdfIn PDF document text
    • https://weniwekozeg.weebly.com/uploads/1/3/4/0/134012595/fawelafuri_rejijerekodepe_xokapafu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383128/normal_5f918e086f762.pdfIn PDF document text
    • https://zidinekolinom.weebly.com/uploads/1/3/4/5/134516346/3929624.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5f87f23701a8e.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/f89c965a-3a9e-496d-b9fa-fce1db9c7e50/68480081376.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/how_to_be_a_better_meal_planner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70996362-833d-42bd-95e9-bc200cc91eab/waynesboro_va_real_estate.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_off0000c577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC577 5044 bytes
SHA-256: f6ee617e1ec50a63b37233b50565081676e55706f2fb83f790aca25adbd4aaa5
font_01_sfnt_off0000d6b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B1 10708 bytes
SHA-256: 80ec1f51fb6afc4a45fa76a5dc73a79e47d3b7cfa6b237ef3684640b945377ad

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