Malicious PDF — malware analysis report

Static analysis result for SHA-256 25c8e950a02d223b…

MALICIOUS

PDF

72.2 KB Created: 2021-01-08 21:15:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d086729e035e1f0b2082327fea7c8ac3 SHA-1: 7221ab9f466df65311b792dccc7686966cef062b SHA-256: 25c8e950a02d223bfc6e32ec1d88a1f61137e0a1addef3cbf31be78e6339454e
96 Risk Score

Malware Insights

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

The PDF file contains a lure related to 'organic chemistry carey 9th edition pdf' and embeds external URIs, indicating a phishing or malware distribution attempt. ClamAV detection as 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0' strongly suggests malicious intent. The presence of embedded URLs and the ML classifier output further support the classification as malicious, likely serving as a phishing document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/123?utm_term=organic+chemistry+carey+9th+edition+pdf PDF link annotation
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/wirexanusir.pdfIn PDF document text
    • https://musisemikalig.weebly.com/uploads/1/3/4/6/134694348/piwuvug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365613/normal_5f871bd0b1f91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379473/normal_5f8f67931f898.pdfIn PDF document text
    • https://navojinalano.weebly.com/uploads/1/3/4/7/134755450/filopuvelilonanu.pdfIn PDF document text
    • https://vujanakisa.weebly.com/uploads/1/3/4/4/134401771/jaxutanijeranosek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381730/normal_5f920dff8fc4c.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/30fc04b3-9fb0-405a-8e4e-f31a402e6f72/how_to_fold_boxers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98ee6082-2b9d-42b9-9f84-596ac9e603c3/grol_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fae19e9a-e195-4abb-980b-0328b735ce3e/71979724292.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/60625070390.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_off0000d8af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8AF 5824 bytes
SHA-256: 5838b3c9714dbec707abb1f0580809d460d3547b005697af58e4dcf5ee73809c
font_01_sfnt_off0000ec5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5F 11060 bytes
SHA-256: 6007ac8179cc8e277d546b320e12f0240363312a69099f7d1b145f6db8c6e02d