Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4c237062b45c66c…

MALICIOUS

PDF

67.9 KB Created: 2020-12-15 20:11:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 653a8d3b68554ba116db79e2e35c179c SHA-1: e6c419808f136e69af5ef76666e4f80a90376d21 SHA-256: b4c237062b45c66c4b0ec077f964eada25762b74d7e6624569b4806f233a9c8c
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The embedded URL points to a suspicious domain, suggesting an attempt to redirect the user to a malicious site for phishing or malware delivery. No scripts were extracted, but the PDF structure and URL are sufficient indicators.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/123?utm_term=paso+robles+theatre+times In PDF document text
    • https://bipotanerazufis.weebly.com/uploads/1/3/4/5/134597687/sugivix_doxaxibibew_wamatowovi.pdfIn PDF document text
    • https://wekonopu.weebly.com/uploads/1/3/4/8/134848362/laxogogefevi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc658f9a-fab0-4dc7-9264-df6a4eeee202/becoming_batman.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7a864fa9ecc3978a0c3e8/t/5fce18c1d235d37878ed5b2b/1607342274641/47035333287.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/763d4b7a-fa0e-4519-b811-be40df65d86b/gewefunewedofesuzokubipo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0f18faa-8cfd-4a21-874b-b586971e1f4e/latupemifakawejovomorelep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94aae33c-cb63-4cde-a2a4-af2b26c2bf07/germany_absolute_location.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df0c6d61-e9ca-487f-9f34-1f7b7142826b/17470798574.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51dda4a8-99f0-400d-a2a0-6f16ba5d29a5/pdf_de_comboio_rfo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c3d560f2895dc1e72903/t/5fc10e0c3c6ccf69f38323dc/1606487565424/society_and_religion_in_elizabethan_england.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/zavarawalarovumagi.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/10877570755.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://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b1a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1A0 2968 bytes
SHA-256: afcae459a23cd8fad60e71fa482ed795063b178ca7a96d5a337757ed3e51a98b
font_01_sfnt_off0000bc46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC46 5064 bytes
SHA-256: 5cd810f298d2e068d39363c7c8f2ac56bb796f085806aa6cd5f121f36d884893
font_02_sfnt_off0000cd42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD42 6148 bytes
SHA-256: 0b38f6fd5e0b54bfa22d5adee1cfe00629fe134100fc7cfc1ad14a2ab7974207
font_03_sfnt_off0000dd22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD22 11096 bytes
SHA-256: 79ceff75d03ea91e2558138148166018019274d4585d14c320cf5f573346c3b4

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