Malicious PDF — malware analysis report

Static analysis result for SHA-256 9131718a10950aea…

MALICIOUS

PDF

77.1 KB Created: 2021-04-04 12:50:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a7af3025c73065d3ef79e7f0f88f9a5 SHA-1: 52518406afa0bb1b6d823d0bf0960031df693241 SHA-256: 9131718a10950aea23fcb70812035a3d5c00b10ea8f1ddd3b7051740f671b394
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a malicious domain, identified by heuristics and ClamAV as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to a 'construction phase health safety plan template'. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/strik?utm_term=construction+phase+health+safety+plan+template+free
    • http://fanisore.sportsontheweb.net/dark_force_rising_barnes_and_noble.pdf
    • http://xutifufaxe.mypressonline.com/12th_class_chemistry_notes_file_download.pdf
    • http://midesamipazizuj.scienceontheweb.net/16301107455.pdf
    • http://midakurapujif.mypressonline.com/aha_bls_provider_manual.pdf
    • http://kexolifowuj.medianewsonline.com/bounty_hunter_gold_digger_metal_detector_stores.pdf
    • https://robivobaxo.weebly.com/uploads/1/3/0/8/130873737/jetovorojodino.pdf
    • https://jileninaniwepuz.weebly.com/uploads/1/3/4/7/134771173/605a5808f34037b.pdf
    • http://kobivoweder.mypressonline.com/38092721009.pdf
    • http://ruguwafe.scienceontheweb.net/43444150781.pdf
    • http://geloritiveda.mygamesonline.org/61327739945.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sezebepit/74317492745.pdf
    • https://uploads.strikinglycdn.com/files/9b7c4647-5f01-47f5-a706-9b212e87c054/what_are_the_5_bodies_of_water.pdf
    • https://7162f0c1-3bb2-4775-9ad2-1e34613fb889.filesusr.com/ugd/595093_7b249a5f9c18477d9131e8427b5f9481.pdf?index=true
    • http://bitenozof.atwebpages.com/30652232115.pdf
    • https://s3.amazonaws.com/memexelu/conference_poster_presentation_guidelines.pdf
    • https://uploads.strikinglycdn.com/files/e8e0fe8d-971e-46f3-ab75-062d5d9cefa3/25289000179.pdf
    • https://s3.amazonaws.com/nelizenejakarug/54193785278.pdf
    • https://s3.amazonaws.com/wejuvono/vintage_home_comfort_wood_cook_stove.pdf
    • https://af1bea64-f5cd-41c2-a7c1-97f21c1aa057.filesusr.com/ugd/592671_a7e84355486e406592cdac21b2f11175.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c97a947b-e98a-421d-b4b0-696549ab21b3/7th_grade_english_grammar_test_with_answers.pdf
    • https://uploads.strikinglycdn.com/files/94f8cbf3-be98-4d9c-8f74-d48d1025de7e/16738727643.pdf
    • https://uploads.strikinglycdn.com/files/b2161574-895e-4e7e-ab87-b7aa0b333073/boziluxepevigu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000effc.bin
c83988cde69acf4ffd0380bd030431107ddd9e2330e736df026678d8e62eb443		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFC 5260 bytes
font_01_sfnt_off000101c2.bin
4f169326af902e80891d04f8170727e768c874523522be057cd261cc8d65ad6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101C2 10880 bytes

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