Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfcda6c1bc34b094…

MALICIOUS

PDF

66.1 KB Created: 2020-11-17 14:51:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 762ba0331154207b289f719495210646 SHA-1: e2ab47fd33177dba4e15b809a0de28563d3ae7de SHA-256: dfcda6c1bc34b094f89e1f7a09e0b4998960cec142dcaae16ff7b7d3d5624d33
214 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 an attempt to lead the user to a harmful site. The heuristic PDF_SEO_LINK_FARM further suggests this PDF is part of a link farm designed to distribute malicious content. Although no scripts were explicitly extracted, the presence of embedded URLs and the ClamAV detection as Pdf.Phishing.Trojan strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ggtraff.ru/strik?utm_term=vista+satelital+del+planeta+en+vivo In PDF document text
    • https://bemogipe.weebly.com/uploads/1/3/4/3/134379528/8881172.pdfIn PDF document text
    • https://xozoravupot.weebly.com/uploads/1/3/4/3/134314106/6483340.pdfIn PDF document text
    • https://fotejisatowonu.weebly.com/uploads/1/3/2/3/132302873/7445541.pdfIn PDF document text
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/abd45e8c87e.pdfIn PDF document text
    • https://savakorudefipe.weebly.com/uploads/1/3/2/3/132303238/dde60d7a3227c.pdfIn PDF document text
    • https://tatunonomufobuf.weebly.com/uploads/1/3/4/3/134355176/256982.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/wizefulelunibif.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/suxuzubojut/56445673143.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/google_sheets_line_chart_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/49134341778.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/mahadiscom_assistant_engineer_syllabus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4baea1ac-61ed-4510-84c3-91818c0ae12d/muscles_of_the_back_and_buttocks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4b22c21-588e-4994-bf53-3d313f345671/monsuno_3_sezon_trke_izle.pdfIn PDF document text
    • https://s3.amazonaws.com/giwurode/8924883272.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_off0000c5bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5BF 4884 bytes
SHA-256: 8a08dfbbf45d008c28bb85461f0c63d1243213438cbe80db65fff0c501291575
font_01_sfnt_off0000d675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD675 11052 bytes
SHA-256: 5773bb713ca312bda02f6da98c78b6cdabcc3f3c3f39fa25f14567eb2daf3dcf

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