Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e8d460ca873b036…

MALICIOUS

PDF

78.4 KB Created: 2021-03-22 09:22:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: e3321dc44fe3cd9ef2c5f71e12044c3d SHA-1: 8bb1ed8175a93477b03af042166646b269c5ced5 SHA-256: 8e8d460ca873b0366e1464568977794d5604092b1cd43d38f8d56308fa3ec07f
134 Risk Score

Malware Insights

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

The PDF file contains multiple heuristics indicating malicious intent, including ML classification and ClamAV detection as a phishing trojan. It also features an external URI pointing to 'pelibifir.ru' which is likely part of a phishing or malware distribution scheme. The document body, though obfuscated, suggests a lure related to a 'letter of single status template'. No scripts were extracted, but the presence of external links and the overall detection profile strongly suggest a phishing attempt to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://pelibifir.ru/123?utm_term=letter+of+single+status+template PDF link annotation
    • http://rivozuzeno.mywebcommunity.org/22756877726.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493602/normal_60357c487d427.pdfIn PDF document text
    • http://kifisafobubupo.mygamesonline.org/kamokerawebefusavipakaxal.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366664/normal_5fe5ac3225a65.pdfIn PDF document text
    • http://fonixeguga.mywebcommunity.org/49389279237.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://uploads.strikinglycdn.com/files/7f54ec8a-2ad8-47e6-ae4a-07a43266fb2f/get_tough_movement_aimed_at_immigrants.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/bablya_ekas_kesavar_fuge_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/google_chrome_latest_version_free_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee26a027-86b4-400e-9df3-6bd00a85b02e/splinter_cell_chaos_theory_seoul_walkthrough.pdfIn PDF document text
    • http://gumomexad.onlinewebshop.net/janavetikoxosoginasozadi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/287f5603-5bff-4b55-a149-95e594847df8/20743536693.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b953a1d6-7959-457d-92a8-eeb463536908/92492250343.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50f292cf-4ca2-4bbd-9b5a-568403127ea3/biblical_questions_and_answers_for_youth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e58cb3b8-6413-46c8-a53d-54a8f6f5bab5/should_we_cruise_in_2021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/153e181d-8b2e-41cb-86f7-e7e60d1592e5/how_to_open_craftsman_staple_gun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1e18893-84c1-46a1-9659-aa97154f4112/the_journal_of_international_management_studies_impact_factor.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/26456689974.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8da2c5a5-9eb7-4b75-8dab-33649f9695b9/black_and_decker_rice_cooker_plus_rc426_instructions.pdfIn PDF document text
    • http://tosabukevosubar.myartsonline.com/51648196237.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/letter_d_coloring_sheets_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2149d366-5ebc-4f08-bec5-805000e4229e/evenflo_babysuite_pack_n_play_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c71fad0-7d33-49cc-b970-ed9c67926fec/89165901004.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_off0000e78f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE78F 5044 bytes
SHA-256: 8f2498817235207d182f56eec4785dfb0f1c47600cf7aaf40f67509d8a98ee42
font_01_sfnt_off0000f8a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A4 11056 bytes
SHA-256: 78eac09d550827b052fb008cafddece43e657cb4be59cc04609514b5676f083b
font_02_sfnt_off00011e48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E48 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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