Malicious PDF — malware analysis report

Static analysis result for SHA-256 95b2ddf40b83fde4…

MALICIOUS

PDF

67.5 KB Created: 2021-02-15 17:59:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 66d745b7c063550469df7d075496d0f1 SHA-1: 1a4cef9ce17e5c535707aa6ee2afa4e4ac60a308 SHA-256: 95b2ddf40b83fde48b45e53e37a09ac7c15eeee83d61d9d58d1718ac391e0532
244 Risk Score

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://crophysi.ru/wb?keyword=why%20does%20rice%20have%20so%20many%20calories In PDF document text
    • https://cdn.sqhk.co/kegufamop/jd66Rgf/fatal_raid_game_size.pdfIn PDF document text
    • https://cdn.sqhk.co/joduragenep/Vgihghi/global_warming_definition_national_geographic.pdfIn PDF document text
    • https://cdn.sqhk.co/dolitife/idihjah/mi_pobrecita_meaning.pdfIn PDF document text
    • http://wikatugakuvifi.iblogger.org/us_citizenship_test_2019_one_answer.pdfIn PDF document text
    • http://bcpzon4segurabetaviabcp.com/wuzudogoxikew7904h.pdfIn PDF document text
    • https://cdn.sqhk.co/rigowodikot/4hdjghe/23844316971.pdfIn PDF document text
    • https://moxitamun.weebly.com/uploads/1/3/4/0/134040854/74d62530be82b.pdfIn PDF document text
    • http://kasyanbeauty.com/cycle_se_aaya_song_djmmlla.pdfIn PDF document text
    • https://cdn.sqhk.co/walekikem/igc4ziz/dc_recorder_of_deeds_electronic_filing.pdfIn PDF document text
    • https://fakilopatezi.weebly.com/uploads/1/3/1/6/131606638/5529846.pdfIn PDF document text
    • http://fartook.online/simple_cake_designs_for_birthdayyowvd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zetesapoxus.epizy.com/free_german_language_books_for_beginners.pdfIn PDF document text
    • http://fasilew.epizy.com/62194096288.pdfIn PDF document text
    • http://kotutuvotijol.rf.gd/lecture_ready_3_answer_key.pdfIn PDF document text
    • http://wafubarig.epizy.com/autumn_spring_movie.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_off0000cba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA0 5356 bytes
SHA-256: d49309ff54ddfaef341201162a78242eefca623369fb3a59e88bc975502639a6
font_01_sfnt_off0000ddbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDBF 10376 bytes
SHA-256: 4618d953e27a7c6f988936f1449c77e0502345a4ef3808a1cca0f37b12c38081