Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e90eb31083b2aa5…

MALICIOUS

PDF

83.9 KB Created: 2021-05-04 09:19:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eafaa1114dcc3438a263a97b99dbe7f5 SHA-1: 97cf972523121cd6052bfb9ee804365c9d07c5d0 SHA-256: 3e90eb31083b2aa534c1244916c3731ba544cecacd5a1e4f45c2e0f635543e5a
126 Risk Score

Malware Insights

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

The PDF contains a lure related to Google Maps and iPhone settings, directing users to a suspicious URL. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or credential harvesting. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://resalured.ru/strik?utm_term=how+to+make+google+maps+my+default+on+iphone
    • https://static.s123-cdn-static.com/uploads/4368745/normal_5ff269596a2bf.pdf
    • https://nodukuzizowuw.weebly.com/uploads/1/3/4/0/134000349/7c792.pdf
    • https://cdn.sqhk.co/rudolikube/a8hcibU/17237695028.pdf
    • https://dedotomonifagax.weebly.com/uploads/1/3/1/6/131606429/c211c2.pdf
    • https://static.s123-cdn-static.com/uploads/4425255/normal_5ffd0abe42f0e.pdf
    • https://cdn-cms.f-static.net/uploads/4505096/normal_6060d33cb08c7.pdf
    • https://cdn.sqhk.co/tajiwikiter/jVIgghg/earn_to_die_2_part_2_unblocked_weebly.pdf
    • https://cdn-cms.f-static.net/uploads/4450889/normal_600d08956c6f5.pdf
    • https://vebilikowuti.weebly.com/uploads/1/3/2/7/132740371/lanitamole.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/toliwudalamem/thanksgiving_reading_comprehension_worksheets_2nd_grade.pdf
    • https://527ed197-5826-4432-9c89-449afa9d705e.filesusr.com/ugd/65ef70_eba966342faf4d67a9edc68220e2f82a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b3306fd9-0449-420b-abe3-3ea751c09963/how_to_fold_the_total_gym_1000.pdf
    • https://9505ca4c-dfdc-4941-8fde-ded35496d0c9.filesusr.com/ugd/2097ab_7c291aecd9cf490e898e2d4f2b738f8b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4027e27f-c253-4ad6-98bd-32d795f53770/80026632511.pdf
    • https://uploads.strikinglycdn.com/files/f831738c-b6f9-4ead-a231-1a43719066ff/29463428118.pdf
    • https://s3.amazonaws.com/nelizenejakarug/amana_dryer_ned4600yq0_manual.pdf
    • https://79d86aa2-23c4-4aa0-a0dc-c16ac59ae55d.filesusr.com/ugd/ecb701_29dd0d1f41f54c64a2d28c73517ff614.pdf?index=true
    • https://s3.amazonaws.com/budovewesekaz/motorola_cp200_service_manual.pdf
    • https://uploads.strikinglycdn.com/files/3848d00f-00ba-41ce-be37-51dab26c27e2/what_is_a_quantum_physics_question.pdf
    • https://s3.amazonaws.com/xoguwavosuje/printable_hundreds_chart_free.pdf
    • https://s3.amazonaws.com/wenobagupexekap/chemistry_nomenclature_practice_problems_with_answers.pdf
    • https://fb4bdcd3-28a3-4206-a6c3-fb267f511c23.filesusr.com/ugd/0ad562_113a61238c9f4398af1e6711ae379f57.pdf?index=true
    • https://94aa8f26-b07a-4c24-bdb4-4112657565c9.filesusr.com/ugd/37428b_7c25a61f10514ccba1c1bd6d560197ca.pdf?index=true
    • 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_off00010573.bin
152b2db09acefde7b50980c8aacd5f9f3a8f283d67ca936cc8d3c582764b1f26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10573 5580 bytes
font_01_sfnt_off00011863.bin
f9c58d1ebbd91de8e0b2ddef6e835b50bbe776b8b9cdb497949223feda2255b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11863 11532 bytes

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