Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c37680045b4457c…

MALICIOUS

PDF

77.1 KB Created: 2021-03-03 10:49:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 6b42be280f047b9e6f4e34327bbfb46d SHA-1: cb187e7a3d7ea438859f3b20da9e0d0c1143e3e0 SHA-256: 2c37680045b4457c81456e786e07eb91e65094667a972da77b4690ef0d766201
194 Risk Score

Malware Insights

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

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically identified as a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'theories of motivation' to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/strik?utm_term=what+are+the+main+theories+of+motivation In PDF document text
    • http://vowufijetapiko.sportsontheweb.net/dyson_dc41_replacement_parts.pdfIn PDF document text
    • http://kumululurug.scienceontheweb.net/52997526937.pdfIn PDF document text
    • http://nuzimes.iblogger.org/how_to_play_a_blues_scale_on_guitar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://suginuzebaluwom.rf.gd/welezarukoxawejavefago.pdfIn PDF document text
    • http://nesuzilusuk.epizy.com/vilujupuwo.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/my_talking_tom_app_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/70331956309.pdfIn PDF document text
    • http://ziwivazud.onlinewebshop.net/sanjoy_dasgupta_algorithms_solutions.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/impala_platinum_annual_report_2018.pdfIn PDF document text
    • http://kavexuvosa.epizy.com/buvowup.pdfIn PDF document text
    • http://viwivebobip.epizy.com/sewotufuf.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/kunark_leveling_guide_p99.pdfIn PDF document text
    • http://vutevesofu.rf.gd/asterism_bold_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/mipanewijozi.pdfIn PDF document text
    • http://repeputowuz.epizy.com/69229554386.pdfIn PDF document text
    • http://sekovukubetib.epizy.com/free_sheet_music_trio_violin_viola_cello.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/28475374218.pdfIn PDF document text
    • http://rofuvawitarul.atwebpages.com/dark_souls_3_save_game_editor_pc.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_off0000f14b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14B 5048 bytes
SHA-256: b0847d3dc05c43442ec8f4136cf4fbbe1527f315fa23a6f3943f53b6838f3d90
font_01_sfnt_off0001025b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025B 10584 bytes
SHA-256: 0bab25bad0fc9b3246879dfaf6ad1de75ff3b7e39de5cc2a055e94d6e7a45031

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