Malicious PDF — malware analysis report

Static analysis result for SHA-256 e83dc365b747f149…

MALICIOUS

PDF

80.5 KB Created: 2021-04-06 05:11:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 58ba4ee148248cacd77381ab535447a6 SHA-1: 278f5c2fe930aec444a4d723cb8edbca1f4165cb SHA-256: e83dc365b747f149ff50ffcef73dc28d31777b06bb30ad927d556ca350907b15
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with one specifically pointing to a domain associated with award-related keywords, suggesting a lure. The PDF structure and embedded content indicate it's designed to exploit vulnerabilities or trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://maypoin.ru/award?keyword=free+alphabet+letter+templates+to+print+pdf PDF link annotation
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://mifvideo.space/7_years_from_now_ending_explained7drq9.pdfIn PDF document text
    • http://fineagencyy.com/how_much_does_digital_marketer_maked2yly.pdfIn PDF document text
    • http://lovemecompletely.com/wozajimetozujxnphv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464303/normal_6024fab211f4b.pdfIn PDF document text
    • http://iwhite.space/nuporaturigiwomaitu97.pdfIn PDF document text
    • http://memaberenux.scienceontheweb.net/woxakowa.pdfIn PDF document text
    • http://jofifuneku.medianewsonline.com/alexitimia_libro.pdfIn PDF document text
    • http://reznitskygallery.com/books_like_the_passage_by_justin_croninxuhq8.pdfIn PDF document text
    • http://sakhavto.ru/zulokanifupozolaburakedosl47f5.pdfIn PDF document text
    • http://gratoram.site/zufutubibazovenepamevabdbxoe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486220/normal_60513a52dd2fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409110/normal_6003b6ed77bde.pdfIn PDF document text
    • http://uscreditmonitoring.info/bollywood_movies_2016_full_hdj8i07.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://30372bae-fb3d-4285-bee0-d91e70c22047.filesusr.com/ugd/835091_a86f0a9f432146b9887d274bb894b6ac.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/93e75e95-94fa-43ba-8f7f-9ac4ce60d829/gikatikezabalun.pdfIn PDF document text
    • https://9eaa565e-fb97-40b4-b096-d6760803f699.filesusr.com/ugd/55e2c6_c57b21eb721e41e482cba40292e37b6c.pdf?index=trueIn PDF document text
    • https://38c64f87-0506-4925-a3a1-425743e24937.filesusr.com/ugd/386d45_646f51c762b84a33bbce9335147bc0b1.pdf?index=trueIn PDF document text
    • https://b19b3b79-9ae2-4e99-9b16-ef32671d60f4.filesusr.com/ugd/0bc867_c6025f98cc39435081d20b12e784cdd8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ce232ba-38b5-43db-90fe-784b199107f4/reveries_of_a_solitary_walker_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff85f94d-84ab-420f-8173-dd9a840e8c18/how_to_simplify_a_rational_algebraic_expression.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/410b23ed-7174-4a47-8db0-1ee6c138381a/mixing_and_mastering_in_fl_studio_20.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1c622a2-48d3-476f-950b-4deddf860358/lazopezadanukugosuxoni.pdfIn PDF document text
    • http://xuvuzonixo.onlinewebshop.net/how_can_you_tell_if_you_have_viral_or_bacterial_bronchitis.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_off0000fdb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB2 5376 bytes
SHA-256: e8807596848bc07f7ca3abdfd6c973846a5fd13b5e6c5c87298ac97ec1be3766
font_01_sfnt_off00010fc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC2 10600 bytes
SHA-256: eb2a4a300157592fd7b5d4551824b4927512108c0cce00e9d3237b4c27d5f266