Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1045ded5f1dfc27…

MALICIOUS

PDF

76.4 KB Created: 2021-03-09 13:01:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: eadd9aa8998fca1699d21beb949fc2d2 SHA-1: 9b13cb672a8110b6ceafcd21f73469f8925bae3e SHA-256: c1045ded5f1dfc27baaa9008e9fbe189bb3f3722bd54e794339e71c883a7f496
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to dafemum.ru. This indicates the document's primary purpose is to trick users into visiting a potentially harmful website. The ML classifier and ClamAV also flagged this PDF as malicious, reinforcing the phishing or trojan-like nature of the file. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • 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.
  • 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/123?utm_term=scientific+literature+citation+format In PDF document text
    • http://jozarizotugi.22web.org/schedule_a_itemized_deductions_worksheet_2017.pdfIn PDF document text
    • https://cdn.sqhk.co/mujejadalale/VLXLTja/shark_world_game_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/terasovo/hbhfVie/87443885222.pdfIn PDF document text
    • https://cdn.sqhk.co/gapekozuwa/hbhijhc/criminal_case_definition_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/begokaxawip/DrMjdhe/4601638817.pdfIn PDF document text
    • https://cdn.sqhk.co/gizoxemovefi/gcyjfFi/evoland_legendary_edition_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/nobixapo/jbjiegj/facebook_search_not_working_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/zaperarori/iihftKl/default_dialer_app_android.pdfIn PDF document text
    • http://nekimul.22web.org/audacity_exe_free.pdfIn PDF document text
    • https://cdn.sqhk.co/kubarevopew/ZhigVji/41148990087.pdfIn PDF document text
    • https://cdn.sqhk.co/fesakesovoka/hfjgXMv/nowesejisilili.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/00951fa4-690a-4e23-adb8-86e0d0c9dd84/50357582785.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/913fbfb8-c754-485c-bb92-e56331753653/is_the_invisible_man_suit_possible.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7b4aba4-63d9-437b-9356-23eeeec16675/what_is_microsoft_project_standard_2019.pdfIn PDF document text
    • http://zaniwemikadas.rf.gd/brocade_san_health_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49141528-1d54-4a9e-9019-536b0fc9b571/generac_4000exl_oil_change.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/homophones_worksheet_for_grade_1.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/afcat_2019_application_form_apply_online.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/notexetigubemowigukilumu.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/pubodosefekaluf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c160569-b78e-4d78-8d25-6f84cbdc0a46/vuluwavitanip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7252aa0-5ac2-4bd5-b734-2a5118b321cc/vita-mix_management_corp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7877c5b1-0fc1-48f5-86f0-d6ce61f9efbf/sitizaxadibekuzo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d50b8184-ba02-4d00-9007-661712322f2f/56002169910.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_off0000eeac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAC 4952 bytes
SHA-256: f2246266f39f7b4d14afb49b856700d3b34e3bb52469e3e0f669a7f90a7441ed
font_01_sfnt_off0000ff74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF74 10828 bytes
SHA-256: b5dd979b39c5fbd5b6866986c0b7cf29619023f215b46848a76e0a9d163f2000

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