Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d0e4fe9ad7d1110…

MALICIOUS

PDF

82.1 KB Created: 2021-01-14 23:11:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: ea5abe7b0c4cde5165701bd1182c185d SHA-1: 753530d01d374b0fd5dc0bb57824b4a06951cc4f SHA-256: 5d0e4fe9ad7d111049479ca74ea1af240262019aa6297a9901c0377b5ed89bbf
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to direct users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ggtraff.ru/aws?utm_term=galilean+moons+of+jupiter+lab+answers In PDF document text
    • https://site-1166653.mozfiles.com/files/1166653/warlings_armageddon__ios.pdfIn PDF document text
    • https://cdn.sqhk.co/vujenibolo/2CRLfHu/vapereketu.pdfIn PDF document text
    • https://dorakipep.weebly.com/uploads/1/3/4/7/134747047/sozorobobem_kiditisawabem.pdfIn PDF document text
    • https://zefisuket.weebly.com/uploads/1/3/4/8/134868467/dovagitolokixetom.pdfIn PDF document text
    • https://site-1166653.mozfiles.com/files/1166653/96954826588.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/safowef.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/jdjjheX/adventure_power_ninja_steel_megazord.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/kabisebax/hey_jude_piano_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/printable_car_sales_receipt.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/witcher_3_guide_prima.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/43264035048.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/21378344327.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE919 5388 bytes
SHA-256: 93787734fa2eb1820afce0eb6f87726b7d8a53ab53c88f3f2d3beb3ef7fe8deb
font_01_sfnt_off0000fb67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB67 11908 bytes
SHA-256: 3fc3ac09a45c1db3f293eb9cae978f5e040a8e0876229daf3472600af4f45054
font_02_sfnt_off00012363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12363 16436 bytes
SHA-256: 81e5d744f1469ddf53ac177aa93f17e2258f6e8da1d6c6d7c6a6e63936fd6065

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