Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a31008b4b45d722…

MALICIOUS

PDF

78.3 KB Created: 2021-03-15 22:31:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: e9c86e268c092ae86b2e952ca270ec0d SHA-1: 02273a32760c53ef0d14bf2301b319e4b52dae7d SHA-256: 8a31008b4b45d722428d6f39b08ac235258c488de12dc0a3581a9e2497be134e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains, indicating a likely phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are consistent with techniques used to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

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://jumiwimov.ru/wix?keyword=isotopes+find+the+message+worksheet+answers PDF link annotation
    • http://gisoboxizaza.mygamesonline.org/nezawozudaxumexa.pdfIn PDF document text
    • http://fukoramilani.22web.org/sufibezejowimeja.pdfIn PDF document text
    • http://zebozewazogaso.scienceontheweb.net/5404155625.pdfIn PDF document text
    • http://lejugowiwusog.22web.org/advanced_cfop_method.pdfIn PDF document text
    • http://zizodoroluxonaf.sportsontheweb.net/gozikum.pdfIn PDF document text
    • http://zuduwamani.mypressonline.com/83334235981.pdfIn PDF document text
    • http://duvejajenivogik.getenjoyment.net/1217171726.pdfIn PDF document text
    • http://mimudobaros.22web.org/58355513851.pdfIn PDF document text
    • http://nizavevorupuj.mywebcommunity.org/650998575.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://36535336-4f9e-4c0a-b1ad-3385cb5d4299.filesusr.com/ugd/15ebe2_00bc041569eb41ea9e06a59b869d03e9.pdf?index=trueIn PDF document text
    • https://f110cc6a-49d6-427c-9ab6-a3a4d323b004.filesusr.com/ugd/9e53d4_491f104f9f3a45ee81249506fac6a7bb.pdf?index=trueIn PDF document text
    • http://ligifufeg.rf.gd/penguin_young_readers.pdfIn PDF document text
    • https://d4078116-a2d5-466f-97e6-20d899f6ca30.filesusr.com/ugd/576447_74f28264e5a34e82b73d5393ebf03e8c.pdf?index=trueIn PDF document text
    • http://kevatudoritek.rf.gd/michelin_guide_france_2019_english_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/136dfb23-807f-450a-8d72-3ad50bd27149/clasificacion_de_los_numeros_decimal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c58cb8db-af80-4ff3-9e79-871dfebcc53e/85855950511.pdfIn PDF document text
    • https://3176e400-c268-4dc0-8d69-08eae86937f8.filesusr.com/ugd/ea2f88_f15ab06a532845fd9da2d27a030a541f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1841593-161e-4d02-9218-11be426672ab/excel_chart_template_extension.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bcf68e6-5773-40a4-ab02-394f83132c64/healthcare_data_analyst_jobs_near_me.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_off0000e5bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BD 5304 bytes
SHA-256: d88216de1e596c99415438c781d4ba2b57688dc6ce65d51417f0746dba30c860
font_01_sfnt_off0000f7a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A3 11176 bytes
SHA-256: a5e8ca92a18ab946a77e44f01f92230451ee484f036f9ea3ed614b97b5ab311e
font_02_sfnt_off00011de2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE2 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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