Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b10422a2d754e94…

MALICIOUS

PDF

76.3 KB Created: 2021-04-02 13:08:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d0862b2456ca5be1b75479247731b0f5 SHA-1: 9637ce8b5986c8c184100e2318a41b64ee62600d SHA-256: 9b10422a2d754e94d58c8a2d80cf195ca82375e5ac3b66ff9db5f0db21bb1d12
192 Risk Score

Malware Insights

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

The PDF contains embedded links to known malicious redirector infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also flagged this PDF with high confidence. While the document body is heavily obfuscated, the presence of a download button lure and the overall structure suggest an attempt to trick the user into navigating to a malicious URL, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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
  • 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://dafemum.ru/award?keyword=ansys+tutorial+book+pdf In PDF document text
    • http://mumolazesinidix.getenjoyment.net/what_is_skinners_theory_of_personality.pdfIn PDF document text
    • http://lumejaramelu.mygamesonline.org/74416044789.pdfIn PDF document text
    • http://zakosemej.mypressonline.com/faint_positive_line_on_blue_dye_pregnancy_test.pdfIn PDF document text
    • https://cdn.sqhk.co/fanabezom/ZCiem7W/anime_girl_wallpaper_iphone_4k.pdfIn PDF document text
    • http://vuzuwul.getenjoyment.net/coast_guard_correspondence_courses.pdfIn PDF document text
    • https://cdn.sqhk.co/gisepavuv/lEKDiaz/north_stars_hockey_team.pdfIn PDF document text
    • http://wavobulowuxixi.22web.org/giramiwanaxudoparib.pdfIn PDF document text
    • http://sunazeremitiwu.mypressonline.com/carl_jung_theory_of_personal_unconscious.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/apple_store_book_appointment_westfield_shepherds_bush.pdfIn PDF document text
    • https://27f1a270-5048-4778-87f0-574dfe85248a.filesusr.com/ugd/b7306e_910a9dd6a8ed4b1794243c1967b977da.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/donarepemi/affliction_warlock_classic_guide.pdfIn PDF document text
    • http://legofovivaxom.epizy.com/77024512058.pdfIn PDF document text
    • https://7fe1f042-206b-4735-a408-f56337efeeb4.filesusr.com/ugd/d34b51_9404f2905c2f4450a847023e07358d6f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tosego/hunter_douglas_power_rise_remote_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/vapazafogaziweguwasiviz.pdfIn PDF document text
    • https://ded05c8b-f0d8-42bc-a64b-daa0b63394ca.filesusr.com/ugd/99afdc_dd2901182afa42db8370fa28fee2faff.pdf?index=trueIn PDF document text
    • http://vowafixugologu.epizy.com/59260637490.pdfIn PDF document text
    • http://ziwivazud.onlinewebshop.net/43534050260.pdfIn PDF document text
    • http://kanusilos.epizy.com/mimimixeximaxigefuz.pdfIn PDF document text
    • http://bujepefu.epizy.com/camp_chef_wood_pellet_grill_parts.pdfIn PDF document text
    • https://b0b89e74-75d6-43b0-bb8f-fa2cd9bd5f5b.filesusr.com/ugd/b5ae3e_8d3867a9b24a42c89a239529c125704a.pdf?index=trueIn PDF document text
    • http://nufulavidibime.myartsonline.com/pajavibetewumetij.pdfIn PDF document text
    • http://wugetad.myartsonline.com/nukaremupolimazimunivagow.pdfIn PDF document text
    • https://2a497570-3881-454f-aefc-229a18bbdf22.filesusr.com/ugd/83e24f_1a3f1d8b367542d4b7a437fb458fec44.pdf?index=trueIn 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_off0000ea43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA43 5332 bytes
SHA-256: b2bec1e3c3a9d6ee66fc3b46da01527f7f0cc96d01661d609eda9b4f39ea9b06
font_01_sfnt_off0000fc77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC77 11028 bytes
SHA-256: 59f8421eba66edac9ac394066e93800e9640b3baba4707ec77aaf3550cac24da

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