Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6f28eecaffd6910…

MALICIOUS

PDF

77.9 KB Created: 2021-03-07 23:12:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: b26f1f9ffc446ab78c09f40acac55417 SHA-1: 4505600f5511e7ee2d695b014baf31a5d7ceaad0 SHA-256: f6f28eecaffd69105a260691654135ea78a551dd2d6f7a29e037056ca858f6b7
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ML classifier strongly indicate malicious intent. While no scripts were extracted, the document's structure and embedded URLs suggest a phishing or redirection attack, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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/wix?keyword=enzyme+lab+report+biology+1406 In PDF document text
    • http://subonus.ru/324251032781gghl.pdfIn PDF document text
    • http://edalovert.xyz/365169690903loun.pdfIn PDF document text
    • http://marketes.pro/33721386863v3f48.pdfIn PDF document text
    • http://qqkaxes.xyz/bejeweled_classic_for_pc6de2a.pdfIn PDF document text
    • http://tesopinafap.22web.org/bedding_sheets_walmart.pdfIn PDF document text
    • http://gerda-msk.ru/how_do_you_open_a_stuck_freezer_drawer8jt87.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/votubukaxogilix/jojolasatogudukew.pdfIn PDF document text
    • https://31c8a3d4-0132-49f1-a04f-09c79d03e01f.filesusr.com/ugd/a4da84_c3f19308b62648c98518742fdf13b98e.pdf?index=trueIn PDF document text
    • https://99470c7d-c692-4648-a7b8-36ea19db2883.filesusr.com/ugd/ab059d_9cb0ec36a1264576832c49ffb768bc7b.pdf?index=trueIn PDF document text
    • http://mudefikireneb.rf.gd/inference_worksheets_grade_5.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/acestream_android_chromecast.pdfIn PDF document text
    • https://171e2b11-24ea-4535-acac-f971ec821c4b.filesusr.com/ugd/a07927_9767aecf15b9465fab1bd96a6b5a7d99.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sisaxu/junazagi.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/bisleri_camel_ad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dbad565-6249-47b7-8959-8f49bdb6973e/inkscape_1.0_appimage.pdfIn PDF document text
    • https://c63ca81c-6df4-4ec3-bc2e-8508f29a6879.filesusr.com/ugd/d48fe3_fb3ad48f2245408082f57241b74c1e73.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/156b374b-a182-4c2b-8fcd-74bb0007aa16/bolt_action_game_review.pdfIn PDF document text
    • https://2489a575-72f7-492f-b117-28cfe4a4d2a3.filesusr.com/ugd/d81705_6f6754a5c474410e8f37b0c239d4bdf4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sezebepit/central_high_school_tulsa_uniforms.pdfIn PDF document text
    • http://pajiridi.rf.gd/guxajep.pdfIn PDF document text
    • http://dimonejoxu.rf.gd/frp_bypass_app_for_android.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_off0000f491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF491 5644 bytes
SHA-256: 60c7a839a991e68b4969421dd41177f6830afebf39e740e61d50daab2b19bb74
font_01_sfnt_off000107d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D2 10188 bytes
SHA-256: 15403207f9a705eba01bdf47cccc6e152016f922ae3668868f9b90e9eedbc0a1

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