Malicious PDF — malware analysis report

Static analysis result for SHA-256 3814724b1478c03e…

MALICIOUS

PDF

74.0 KB Created: 2021-04-23 03:05:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d2e010551e3b31e76438491e069c5fe3 SHA-1: c07242d90e1e335ec57bca5fc43a85c8e2485c38 SHA-256: 3814724b1478c03e67a46338f82b3ec9476889828384235fc1eb851bc59664cd
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious URL, which is likely part of a phishing campaign. The document body, though heavily obfuscated, contains text related to 'Pennsylvania ebt access card phone number', suggesting a lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/strik?utm_term=pennsylvania+ebt+access+card+phone+number PDF link annotation
    • http://nufivuzelikonax.getenjoyment.net/apl_2020_schedule.pdfIn PDF document text
    • http://molotkov.site/flowers_for_algernon_audiobook_progress_report_10il0bk.pdfIn PDF document text
    • http://forexgeeks.net/bus_driving_games_for_pc_freeayzcu.pdfIn PDF document text
    • http://derilezin.sportsontheweb.net/ambiguous_grammar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wikurixobelu/20548962157.pdfIn PDF document text
    • http://zuputes.atwebpages.com/facebook_blueprint_study_guide.pdfIn PDF document text
    • http://zenakezogutomu.onlinewebshop.net/jatitodamawupelataw.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/97711937443.pdfIn PDF document text
    • https://5849b288-062f-49f8-a71b-da420f1f00fd.filesusr.com/ugd/c068f8_b9d49657b295470b9e3adafdef310c44.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/da66120b-add2-41a9-8f99-b953ce9bc9df/civics_today_citizenship_economics_and_you_chapter_2.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/75127366502.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69423af2-67c9-4db7-be87-4353a98ea19b/diamond_infinite_edge_pro_vs_sb1.pdfIn PDF document text
    • http://dinilemave.epizy.com/visuvatenonuzadakosere.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/taguzeluzofad.pdfIn PDF document text
    • http://jominata.rf.gd/bunya_light_font_free.pdfIn PDF document text
    • https://2eb5e741-fe40-4e13-9a70-20af0821b154.filesusr.com/ugd/6cf56c_c46ae5ebf39345758640a42e89e9c43f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3807378c-288b-4ad4-ab35-d6346a1464eb/49409228416.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD651 5496 bytes
SHA-256: 80dfb2f161bb495466e36327fa3e393a4c8c0239d12c8948bae271c8574f4878
font_01_sfnt_off0000e8cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CC 10552 bytes
SHA-256: 0e4d30edbd040abe837117c71130d9a694738d013a41d6cf3ae254deb2bfaa7b
font_02_sfnt_off00010cc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC1 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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