Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c61c3db948eebac…

MALICIOUS

PDF

73.5 KB Created: 2020-12-16 21:20:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 4c8adfd07222fffc12c59734b1a0ee8f SHA-1: 9fcea133beb8b902cea417fb56a03efb39a0b1c4 SHA-256: 0c61c3db948eebacfe9045c11a5f85477da8ae0d78dc2841d5153522804a3ed1
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were extracted, the embedded URL is the primary indicator of compromise, likely leading to a phishing page or a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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/123?utm_term=zefal+pump+instructions In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fc17dd3405d5340f32dc63c/t/5fc52f5e9b1ed0353884c226/1606758241257/i7s_tws_headphones_only_one_turns_on.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6be40e9133927d90a2b20/t/5fcd3f8f24c49707d32c413d/1607286672884/clash_of_clans_hack_gems_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e627116eb00e3c4beed8/t/5fc5b566e6d49a06bb58c03c/1606792551260/congruent_supplements_theorem_proof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05acc7a2-d86c-4c7d-a956-5d6d2619d810/jiwakegisekodupalaken.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d95c3398ff75154720e4/t/5fc5b1c41972c46e3c63abeb/1606791622166/33955072481.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc50ec912facd59cec7ad64/t/5fcae9c3393ce473562988b4/1607133637161/runawip.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/acetic_acid_in_vinegar_report_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/performance_appraisal_phrases_for_problem_solving.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/pupafuxexakopagelebero.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc78a35778af068263f1171/t/5fcf9ae61a78ee5f016e2ea4/1607441129942/reusable_face_masks_made_in_usa_with_filter.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc52571d26ff1194f8f7eca/t/5fca060de262c0159467caa7/1607075342488/37045460488.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6c5e8c39fde0238a55e3e/t/5fd731c45b1f6f7539f0940f/1607938501218/nj_jury_duty_reporting_mercer_county.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d02423cb-6f06-4275-b4ea-03ba2e5cc553/7892816137.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64c7111f-a754-48f1-a7fe-fda5d1970199/off_center_fed_dipole_radiation_pattern.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_off0000d6d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D9 5000 bytes
SHA-256: 7d75526e64cd46eec813f0486088d74d3abd1cd2eb2ed6f11df7cb28b5659b2b
font_01_sfnt_off0000e7bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BF 10432 bytes
SHA-256: 32e2218e7d8448b3510305b9ed00a77c81b9cf624275ece66bc18c839ccf6744
font_02_sfnt_off00010ae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE7 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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