Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac23d430f63a27cb…

MALICIOUS

PDF

74.9 KB Created: 2020-12-26 16:43:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b306cac616b3e29f3a8622e7a9d85923 SHA-1: 1eeb6df48dac28babfc54efa68ebc58f16f30b00 SHA-256: ac23d430f63a27cbfe8ed933dec0cc27808dcb1ad0e247b52a44929f44030bf4
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. Heuristics and ML classification strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to exploit user interaction for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=my+side+of+the+mountain+comprehension+questions PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d33fa2ef-96b1-4a28-9493-c8abbb183301/classics_of_philosophy_3rd_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/gotusalaze.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/alan_walker_faded_video.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/98504808393.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/95927869184.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f2198f8-ed3e-4b13-8a7a-b15638f9ffe9/star_wars_venator.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/arrowhead_park_early_college_high_school.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/99302666300.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/chhattisgarhi_suva_geet.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/dipin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dec3019e-ab94-4f2a-af27-48fefb617617/download_hotspot_shield_elite_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/899934a9-96d6-42e0-a86c-3bcdb7f8e6b3/59426014071.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c894ca0f-abbf-442c-a287-4423b34f6e8e/pizekadufa.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/epididymo_orchitis.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/forming_carboxylic_acid_from_acyl_chloride.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_off0000e62b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62B 5596 bytes
SHA-256: 325d18579288f548478876216c53056f9d61d140d85d0b53aca7c87235ca96fe
font_01_sfnt_off0000f91f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF91F 10356 bytes
SHA-256: b32c8b576335c6d68e975bd0b5057b7db50100d4b1ecbfa157b1d1d66a0fbc6f

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