Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e9d71f60a80362f…

MALICIOUS

PDF

83.4 KB Created: 2021-04-20 22:14:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 6a35184184e5784f32624a1ed4c54700 SHA-1: bbb3a3744a07fe981895f113a03fec4ecaf63d79 SHA-256: 8e9d71f60a80362f537a7b5de994a51f3cf39cbf1dd3021274242845d9ef1a0d
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links pointing to known malicious redirector infrastructure and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it is designed to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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=char+broil+the+big+easy+smoker+instructions In PDF document text
    • https://cdn.sqhk.co/lalusozokigi/ZJgiXIb/17116365140.pdfIn PDF document text
    • http://marinarus.space/2020_wallpaper_download_video_song8v2zj.pdfIn PDF document text
    • http://gisomog.iblogger.org/fofazu.pdfIn PDF document text
    • https://cdn.sqhk.co/wiwokosokif/1wRgfhg/90445636960.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409255/normal_5feed38c38b9f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407562/normal_5fdf58511c9d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475564/normal_5fd63d7e00ad9.pdfIn PDF document text
    • https://cdn.sqhk.co/fikalibumi/ib1hhkz/84867062232.pdfIn PDF document text
    • http://consumer-data-protection-bureau.com/bakigikudajinijesovopo9ri09.pdfIn PDF document text
    • https://cdn.sqhk.co/zeritogekuja/j4XjatI/roloxalozisidisizidupete.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379355/normal_606396e190810.pdfIn PDF document text
    • http://hellochildren.online/wuragijixipevevhpgry.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449627/normal_603dc6cf7b7e9.pdfIn PDF document text
    • https://cdn.sqhk.co/bedipidis/UjhT3Jq/prison_break_season_6_netflix_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471488/normal_605bed0245302.pdfIn PDF document text
    • http://ezfix.asia/download_high_definition_audio_driver_for_windows_10_32_bitzqcwi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455376/normal_603a07dff1e80.pdfIn PDF document text
    • http://hihikane.space/nintendo_wii_u_virtual_console_games_listuv2f7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386076/normal_5fc88887f1d40.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/a02c3817-0229-4b56-bd59-15dd8a5fb4f5/52547370112.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fe4eb08-68f3-44ca-aa50-86974886306b/ribagixadikose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac567812-0097-4de1-9bcf-6f7f11dfde17/61554079679.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a84cc3c2-7ed2-47cc-b1d3-507308dac915/63497726538.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14bb74af-87f6-45a7-a962-3c9796bf71cf/hp_laserjet_p1606dn_toner_cartridge_number.pdfIn PDF document text
    • http://betitunusepa.epizy.com/56189590295.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_off0001097f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1097F 5424 bytes
SHA-256: da1fa99f56a9d91bc94593ff68b7caef77b9103f0ca65f3bc86bb72f4afe9e4c
font_01_sfnt_off00011bd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD2 10492 bytes
SHA-256: 7e163ab7dacf606e903dbbb163d42a59fd1fcc14c61d78ca4197ce44b9468485