Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8f3d6e4d78d709e…

MALICIOUS

PDF

78.2 KB Created: 2020-12-19 20:19:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ef88e83c3f5ed9dacea882fb4d328d95 SHA-1: 95485134f16a294b9f29d6a795e4dda59ef4b09d SHA-256: a8f3d6e4d78d709ef927bec41d74bd1bafd6dc8fae41f65cb3176e999c8bed09
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF 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 explicitly extracted, the PDF structure and embedded URL suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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/strik?utm_term=volturi+twilight+cast In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369764/normal_5f961b0454e2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453328/normal_5fa83d4dc1ca8.pdfIn 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://s3.amazonaws.com/lodazojamuva/36250376041.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/error_on_your_credit_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a47618d-b42f-4c0a-9d50-20d65cfe367d/tizigeza.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc124ceb8467722f1d5c40e/t/5fcab2e4f7d8747e17db6689/1607119588620/65320332955.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/battlefield_1942_patch_1._1.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/rovazowumivizuk.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/netakevepebaruwu.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/african_sac_spider_bite.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/pepuva.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/symmetry_practice_worksheets_4th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/41151241350.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/dragonborn_song_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/dougherty_county_jail_report_february_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/horticulture_crop_production_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54e01affbf90a6607a482/t/5fcb3bfb8dcc5603bef10e1a/1607154693729/dr_david_patton_ob_gyn_charleston_wv.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD446 4776 bytes
SHA-256: 948a414ed27bab88767f84c2aec25946fc0a8dca2efb52ea4f53afdab84dbc5e
font_01_sfnt_off0000e4aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AA 10364 bytes
SHA-256: ed2d018ba7b6283db3c999ac20c98c48ad8e3875c21c228462c20c2d7b27cd70
font_02_sfnt_off00010833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10833 16060 bytes
SHA-256: ae97ebdbf5cb6679ee3ae7f6f8963da9ec2437ada1f672a33085bc8cbe806833
font_03_sfnt_off00011cc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC7 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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