Malicious PDF — malware analysis report

Static analysis result for SHA-256 114cf3a0f7bc2a0a…

MALICIOUS

PDF

64.9 KB Created: 2020-11-20 13:16:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: aeebcc1899afe1ee669f3c65180bf460 SHA-1: e56176600209eeb19c10e937461b9a92845dbf49 SHA-256: 114cf3a0f7bc2a0a7ca3be3827bb826fa8eb21c2c63c6e4bfb2406f845370236
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The document body, though heavily obfuscated, contains keywords related to a 'Coconut water filter system', suggesting a lure.

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://cctraff.ru/123?utm_term=coconut+water+filter+system In PDF document text
    • https://josuzowonuni.weebly.com/uploads/1/3/4/6/134685096/gatimoxitijuwus.pdfIn PDF document text
    • https://finejorokisitoj.weebly.com/uploads/1/3/4/4/134495390/6661932.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/434f41bb-f947-4f08-8769-65be060026a8/tegupipe.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/pamerejidudozorojegifonej.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/cisco_firepower_2110_vpn_configuration_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/pampers_underjams_boys_xl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5625cf59-d58c-401d-827e-9531fcef39e4/xobenixar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6125d3e4-8450-4d6b-93dc-ecc9374e572a/warframe_orthos_build.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbeb435c-7ee0-474d-ba98-99716637e92b/90012836017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7586773-fbf0-4fce-a52f-293ac4c50db8/lightning_returns_achievement_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e542ab6-80a4-4ac0-aa95-560079d1a859/kexanobigawivegeragimit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ab6b8bf-8cdb-472e-b328-6f0af0f04c33/tevitejifoz.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_off0000c604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC604 5128 bytes
SHA-256: 57bea0122214b66967f17787c70f57230d251aa88dff2d80574484de1076b365
font_01_sfnt_off0000d772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD772 9288 bytes
SHA-256: 719f06e8116b0b9a4e21c617eff3546e2ea0f265c67e8130b901f18a837737c0

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