Malicious PDF — malware analysis report

Static analysis result for SHA-256 11b005aae6c8d795…

MALICIOUS

PDF

78.0 KB Created: 2021-01-27 17:33:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a5b72db0def0022ef23291b067bbc06c SHA-1: 2888f670c3a985526cbbdd5ac78d7dec3f960383 SHA-256: 11b005aae6c8d79520f23f19da49d024c84b0617e4eae6ef6987cdd59e60469e
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, suggests a lure related to search terms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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 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://gettraff.ru/wb?keyword=re%20trials%20on%20the%20beach In PDF document text
    • https://cdn.sqhk.co/noperizapewo/igigSji/sojixab.pdfIn PDF document text
    • http://masajsalonunuz.com/funomuwupafwcpyq.pdfIn PDF document text
    • https://vijamosikafej.weebly.com/uploads/1/3/4/7/134772382/bc398b9ac4b510.pdfIn PDF document text
    • http://eurostore.info/57218985694tpjij.pdfIn PDF document text
    • https://gozerezujokosas.weebly.com/uploads/1/3/4/8/134856803/tuvuvone_voxetojimewobus.pdfIn PDF document text
    • https://cdn.sqhk.co/masunidupag/wzIhfgc/5803309934.pdfIn PDF document text
    • https://cdn.sqhk.co/badaxiloru/eJJmNjb/kefumaborome.pdfIn PDF document text
    • https://cdn.sqhk.co/gugapedulob/ghEzhjc/super_s10_launcher_ss_galaxy_s10_launcher.pdfIn PDF document text
    • http://m-laskin.ru/bird_of_paradise_yoga_sequence6um9o.pdfIn PDF document text
    • http://idealica-it.website/slot_machine_games_free_play8oniu.pdfIn PDF document text
    • http://nevoxukuri.22web.org/bathukamma_songs_in_telugu_dj_mix.pdfIn PDF document text
    • https://mebifexet.weebly.com/uploads/1/3/1/3/131381374/9734173.pdfIn PDF document text
    • https://nipifofopofeduv.weebly.com/uploads/1/3/4/3/134338269/6054125d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jorowoti.epizy.com/bootstrap_responsive_templates_free_admin_panel.pdfIn PDF document text
    • http://nozezuwaxufudeb.epizy.com/general_prescribing_guidelines_for_antibiotics.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/gelewugabadiwobanabor.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/9939263895.pdfIn PDF document text
    • http://xenemusexo.epizy.com/9866699527.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/definition_of_cost_sheet_in_marathi.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/barolo_2012_vintage_report.pdfIn PDF document text
    • http://vuvuvemalazot.epizy.com/70120500747.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/cisco_anyconnect_for_windows_xp_sp2.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_off0000eb71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB71 5032 bytes
SHA-256: 4bc437aaae968659b033593258a7d63bba01281d55ff9c22df1113d3575c6338
font_01_sfnt_off0000fc80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC80 1948 bytes
SHA-256: 550dca5be45842239718d6d83dd2f04b1857d78a0b5fdfae52f523d35288f11d
font_02_sfnt_off000105d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D5 10528 bytes
SHA-256: 3140be9581caa238a07f08c1810665a01fda1b8cae72c4b87e931beb0261f3c2

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