Malicious PDF — malware analysis report

Static analysis result for SHA-256 322628fa99410ada…

MALICIOUS

PDF

111.2 KB Created: 2021-04-12 07:48:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d3b9338a7b732cc3ff6fd58280b9eddd SHA-1: b6cc215b8109bf33f3acb3e5c4b9412785c8e1b4 SHA-256: 322628fa99410adaea0b77617825ec22989d76376362002154de611cd1ef033e
184 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, many of which point to disposable hosting or known malicious redirector infrastructure. The heuristic firings indicate it is a malicious redirector and part of a link farm, suggesting a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to lure the user to malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://yafferge.ru/strik?utm_term=is+1024x768+a+good+resolution In PDF document text
    • http://life50it.pro/suralanurafenapuxedamudw9kan.pdfIn PDF document text
    • https://cdn.sqhk.co/joribuluf/KM4jcEu/35321727747.pdfIn PDF document text
    • http://vafefenovabire.22web.org/80027117910.pdfIn PDF document text
    • https://cdn.sqhk.co/jonosefo/eliijdC/obito_wallpaper_para_android.pdfIn PDF document text
    • http://phtech.site/vita_spa_reviews_2020r2nm5.pdfIn PDF document text
    • https://cdn.sqhk.co/lopijikuvi/hchcjij/54547970245.pdfIn PDF document text
    • http://gouliwer.online/84343101806y3ggz.pdfIn PDF document text
    • http://fewafef.iblogger.org/fafusisi.pdfIn PDF document text
    • https://cdn.sqhk.co/fovipobex/iii30qI/55114631348.pdfIn PDF document text
    • https://cdn.sqhk.co/rijakobebux/hcjahdb/heart_starts_beating_fast_when_i_stand_up.pdfIn PDF document text
    • https://cdn.sqhk.co/mixukavusu/RqigvGN/sakiribasirewokukoziv.pdfIn PDF document text
    • http://bejuzoz.iblogger.org/adobe_reader_app_for_pc.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zotikatisi.rf.gd/biopsicologia_pinel_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/318d1266-93ff-4933-b775-31ccfa519878/donald_tyson_le_grimoire_du_necronomicon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9eb57ef-5b25-4a0d-b958-1465063619a9/soundpeats_bluetooth_headphones_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbe2d263-44fe-48a8-8b7a-5b061437e1e9/45968533814.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5ee582c-a0cf-4ee9-aae7-ae8b1fed1b90/how_to_hack_gta_5_pc_money.pdfIn PDF document text
    • http://fapisab.rf.gd/wedasunene.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d4ca064-1ec7-47be-aa00-e278a5e43d27/volume_price_analysis_indicator.pdfIn PDF document text
    • http://jomexikosuzujis.rf.gd/32618826579.pdfIn PDF document text
    • http://rubuvajaroxe.epizy.com/deep_groove_ball_bearing_catalogue_skf.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_off000165dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165DD 1856 bytes
SHA-256: e42c4f19d20367421ed904aa26a7260b5250b441adc8fb26a3f37981eecc86ec
font_01_sfnt_off00016df7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DF7 5840 bytes
SHA-256: 449e0cc792c7c44e335dc8bcfc57dcc66f5fb0668050e13ae7ab44d9a39f012e
font_02_sfnt_off000181fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x181FA 14048 bytes
SHA-256: 6a0ef04885cbb59cb38eb04955b2dba267c25b263cad36d5b9b6498a3b31d968