Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c15f4c2ccb8ccd6…

MALICIOUS

PDF

78.0 KB Created: 2021-03-10 07:54:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: e9c80f743cfaedcdfbd60ce7ea1db386 SHA-1: 4509b416592b42c7956ab11c184e9eca0b37be9e SHA-256: 1c15f4c2ccb8ccd6a263ffe0bce1fffc1d932052e0b088522a72f4b5d47fd1a0
214 Risk Score

Malware Insights

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

This PDF file is classified as malicious due to its redirection to known malicious infrastructure and its function as a link farm. The document body, though heavily obfuscated, contains text suggesting a lure for "short story pdf download". The presence of numerous external links, including one pointing to a known malicious redirector, indicates an attempt to drive traffic to potentially harmful sites. The ClamAV detection further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • 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://crophysi.ru/award?keyword=short+story+pdf+download In PDF document text
    • https://wujipiledulom.weebly.com/uploads/1/3/4/6/134695719/491546ef4f.pdfIn PDF document text
    • http://safetymirrors.xyz/48522151284p41ov.pdfIn PDF document text
    • https://mulokigapasol.weebly.com/uploads/1/3/1/0/131070847/5181448.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489061/normal_601530dc1099d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371523/normal_600eadd371775.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444102/normal_5fd7f12544a92.pdfIn PDF document text
    • https://bojuwidus.weebly.com/uploads/1/3/4/6/134698781/4157575.pdfIn PDF document text
    • https://burekanokem.weebly.com/uploads/1/3/1/0/131069897/2963390.pdfIn PDF document text
    • http://reabook.online/panasonic_cf-53_toughbook_drivers3cjp8.pdfIn PDF document text
    • https://wujipiledulom.weebly.com/uploads/1/3/4/6/134695719/zetejafep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369343/normal_6012f29cba5c9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f480ee46-cf98-428a-956b-50fde4022fce/4707257354.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/lesivogazexipeveku.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/phpspreadsheet_instead_of_save.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/magpul_moe_grip_pistol_grip_for_ar-15__mag415.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d046f68-4767-4f41-bdc7-4f8d771cc59e/why_does_my_asus_monitor_says_hdmi_no_signal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60293002-5778-4a09-b881-f3ff273ac732/68631298189.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/one_piece_grand_battle_mugen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/977c1de3-8723-4b5f-a825-c0ff2ec87921/evenflo_stroller_pivot_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/vomazetamoroporo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b954e37a-2b61-4303-a6aa-2a111d0f1759/10540620267.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/84977591971.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_off0000f575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF575 5428 bytes
SHA-256: a6ebcab3bfae68b90ea366c45638d1ee4fba8273c4b4144c735996d2f2a368ec
font_01_sfnt_off000107fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FC 10180 bytes
SHA-256: a3730d0c46fbc1ebca3c191a22faeab15925a3dac72275c31216c0371660e428

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