Malicious PDF — malware analysis report

Static analysis result for SHA-256 09e7848dcdb71880…

MALICIOUS

PDF

67.5 KB Created: 2021-01-14 03:03:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: a0594fff9019c75484bebea5aa53fdbf SHA-1: ec32b370072e77e80f4be686b6da03b06523452d SHA-256: 09e7848dcdb7188080e5fab9e1a6ccfbdb7ee07670c53946a6cde660db30f446
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including critical alerts for linking to known malicious redirectors and being part of a link farm on disposable hosting. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the embedded URLs, particularly 'https://cctraff.ru/123?utm_term=500+writing+prompts+piccadilly+pdf', are the primary indicators of malicious intent, likely serving as a lure for phishing or malware delivery.

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://cctraff.ru/123?utm_term=500+writing+prompts+piccadilly+pdf In PDF document text
    • https://site-1176040.mozfiles.com/files/1176040/kaviwuj.pdfIn PDF document text
    • https://site-1178617.mozfiles.com/files/1178617/74538436997.pdfIn PDF document text
    • https://cdn.sqhk.co/xaxovowupofa/n7gfbge/82520066349.pdfIn PDF document text
    • https://site-1173608.mozfiles.com/files/1173608/yahoo_weather_api_documentation.pdfIn PDF document text
    • https://site-1175981.mozfiles.com/files/1175981/vaxavelusabikawobaxuve.pdfIn PDF document text
    • https://site-1177879.mozfiles.com/files/1177879/super_smash_jungle_world_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/wezufunin/g2ieNhc/a2z_word_finder_anagram.pdfIn PDF document text
    • https://site-1168101.mozfiles.com/files/1168101/68225664359.pdfIn PDF document text
    • https://cdn.sqhk.co/vazodowadu/ey1Qiao/43615710411.pdfIn PDF document text
    • https://site-1168144.mozfiles.com/files/1168144/virtual_villagers_origins_2_lavastone_cheat_xbox_one.pdfIn PDF document text
    • https://site-1241671.mozfiles.com/files/1241671/sync_chrome_history_android.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/susonanezaj/agnisakshi_movie_video.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/65061089289.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD86 5512 bytes
SHA-256: d90b788aa416864fcf5ad7bdb6eb1289c22d1e6fb2b3b84a38aab9f0514b0588
font_01_sfnt_off0000d02d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD02D 10272 bytes
SHA-256: 8b9e5d689948c99bdb6d5ab6132cb5a8163bb8186a4327bb88483243de5d3a6d
font_02_sfnt_off0000f332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF332 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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