Malicious PDF — malware analysis report

Static analysis result for SHA-256 465f70fedf33bf3f…

MALICIOUS

PDF

120.0 KB Created: 2020-12-27 12:18:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c4d2ed548920ccbc12d6d838f1aadef6 SHA-1: 9daae4290cd70322520b6409081847e85e59c51c SHA-256: 465f70fedf33bf3f1ba3ab7a512fcfc1222e43042f1c413705ef1f29dd67dd42
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector pointing to 'https://gettraff.ru/aws?utm_term=sintesis+de+acetilcolina+pdf'. Heuristics indicate a link farm and a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of malicious URLs and the nature of the heuristics suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/aws?utm_term=sintesis+de+acetilcolina+pdf In PDF document text
    • https://kutemipemowu.weebly.com/uploads/1/3/4/8/134860595/6034705.pdfIn PDF document text
    • https://budamasut.weebly.com/uploads/1/3/4/9/134903336/8146998.pdfIn PDF document text
    • https://wurixexaf.weebly.com/uploads/1/3/4/8/134865586/e6612f.pdfIn PDF document text
    • https://zosupexaduj.weebly.com/uploads/1/3/0/7/130738593/nesemo_jitax.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/didowugorokirug/lududepivifugilabun.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/showbox_app_not_working_on_android_box.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c3578a4-7cc3-42ef-8e50-b7a12eb0ea7b/elmers_mucilage_glue.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a469c2f-84e1-428b-974b-e84087dd1ed7/west_allis_assessor_property_search.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61496c7f-c967-43b7-b59e-dfcfbda46f48/33668666660.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2209014b-244b-4dff-8597-66790e2cc02f/24365264357.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffdf2e8e-99eb-4336-a510-b7b402a76839/lsi_self_development_guide_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/227b08cd-0600-4ea1-a354-1a23a7047381/oedipus_rex_unit_test_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f06dd697-5195-470f-b9b1-7d1e7766ecd0/triangle_dining_table_with_benches.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/sawinaweximenizav.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_off0001980c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1980C 5156 bytes
SHA-256: a230c16215f477afe1a2106be14804cae2a9b408187661ac4b3227a81d348f1d
font_01_sfnt_off0001a9b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A9B0 12156 bytes
SHA-256: afdf80e4e847d5515f2539cf6d38e940ddb451e8b074d516af0e99b73abd167b

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