Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd9fb77df18bb455…

MALICIOUS

PDF

68.5 KB Created: 2020-12-18 03:01:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c120c25b9b98b54185a09b45953e41e0 SHA-1: d83eb72e0233bbae1aeb9f53ccf35ec798e45fa1 SHA-256: cd9fb77df18bb455b880fe714d82e65d5c351c37468714df8473cf071ae10c5b
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that points to a suspicious domain, trafffi.ru. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of embedded URLs points towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://trafffi.ru/123?utm_term=hayward+heat+pumps+for+sale PDF link annotation
    • https://pukotegifo.weebly.com/uploads/1/3/0/8/130874060/wiwakop.pdfIn PDF document text
    • https://buranujepexu.weebly.com/uploads/1/3/4/3/134339299/a2a3e893e14.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/xakusineba/gadumozusefu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b984b7b-bffe-4e01-9055-b493b6ef1fdb/oakbrook_elementary_school_supply_list.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2a834abaecd33182d7d6c/t/5fc3e1d12dd96f5918656631/1606672857177/65989353443.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/wusubafopokidudobuxop.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce91ebe86911410329317e/t/5fd74935481cfa31ade41914/1607944502310/zezodegerukilo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7bab61c59a74bd9926936/t/5fc99d5efedaa13a485cfad7/1607048542896/chronology_time_changes_everything_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b78383e-7baa-421f-8e4b-c7f60800c4dd/20611038963.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d650403f5353fd956949/t/5fc1b3569ee0f32b879298af/1606529879283/nordic_lodge_rhode_island_reviews.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcebba1b44223045ec9a9d5/t/5fd68ea5de5b1220c031f8ae/1607896742009/lagu_minions_papaya_dance_remix_2015.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_off0000d10e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD10E 5436 bytes
SHA-256: 3d006daff658409f45406a41b098f42cc1acf879c27aa7709da0c97fa37deca2
font_01_sfnt_off0000e37b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE37B 10132 bytes
SHA-256: eec5c30b6499d19d197c40f8f6e5b6d1536c8ea1489071b4e0ec30f459d2abfa

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