Malicious PDF — malware analysis report

Static analysis result for SHA-256 429ead3945ce9e10…

MALICIOUS

PDF

69.0 KB Created: 2020-12-18 10:15:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3ddb7ce0f8d2f71fffbb0d7743573b80 SHA-1: 11889c79eb934b40902517fbedccb92bf91b0fac SHA-256: 429ead3945ce9e10d4cb11c1f9d4165aeaac251c386ae9f88f0149973a422e7d
136 Risk Score

Malware Insights

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

The PDF file is identified as a malicious phishing trojan by ClamAV and an ML classifier. It contains an embedded URL that redirects to 'https://trafficel.ru/123?utm_term=ice+conference+2020', presented as a lure for an 'Ice conference 2020' download. The file's structure and detection signatures strongly indicate a phishing attempt delivered as a document attachment.

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/123?utm_term=ice+conference+2020 PDF link annotation
    • https://dopapebo.weebly.com/uploads/1/3/4/8/134870178/ririfapitasi-vumapun-gasegomel.pdfIn PDF document text
    • https://duxoberadu.weebly.com/uploads/1/3/4/7/134718286/1761774.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/jonora/corded_telephone_with_answerphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f91fe112-9348-4fb7-90c8-8c101c8cbe97/80126840743.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1865eb04-9754-4978-a0b2-ee2072c9410b/sword_of_destiny_kaththi_theme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a26f47a3-6550-4d63-b783-ad50668e8f57/theodore_boone_kid_lawyer_ending.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fa1569f-9dcf-4ba8-9a6a-c8745f874edf/xowegikagawo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da7636a9-16fb-47b3-aa79-017fc2c1e5c7/wekepufavenixexaxomag.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc59989c14dfd36fe117a88/t/5fcdc8e1662d5e24e0c31131/1607321825796/sojuxikivagako.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5e439ee0f32b874b4536/1606377035289/the_street_of_the_canon_vocabulary_builder_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1823aea4a794d564964e6/t/5fccec2deb18547f4b852e77/1607265325326/terraria_super_sniper_rifle_vs_all_bosses.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/vage_formuliert_englisch.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_off0000d33b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD33B 4664 bytes
SHA-256: a1326bb5e8fd6ea670df984f874debdfd94a0ce448400f1dc42f0978989b8cb1
font_01_sfnt_off0000e32e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32E 10632 bytes
SHA-256: 9c0e3ec4d96fabb0442058d04bcaccd7ca158164b9752d9f03c2ddc0ff76ddf0