Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a5ec2d1d12a87cc…

MALICIOUS

PDF

133.3 KB Created: 2021-03-29 01:06:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 32ecebf679338a19bb4740f82ac28999 SHA-1: 94c282cb100bcb21f1ce568ebbf69448e26bf240 SHA-256: 7a5ec2d1d12a87cc49c1a3b256c66d3a9723fd3734970bdce7f4932134ce3c78
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, likely as part of a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to host multiple links on disposable hosting, further supporting a malicious intent. The ML classifier and ClamAV detection strongly indicate malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9808

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://xezojetit.ru/award?keyword=quimica+inorganica+shriver+e+atkins+pdf PDF link annotation
    • http://xodaxedepapopox.mygamesonline.org/apologa_de_socrates.pdfIn PDF document text
    • https://cdn.sqhk.co/xovikojux/jcaIjgf/your_guide_world_travel_tour_guides.pdfIn PDF document text
    • https://dosoludu.weebly.com/uploads/1/3/0/8/130814101/fawobadenifanix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386347/normal_60446bef6be55.pdfIn PDF document text
    • https://gepavemu.weebly.com/uploads/1/3/4/8/134861499/vuvireledodebugerif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419822/normal_603682c4b4cc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366630/normal_5fd8c9c360c80.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377128/normal_5ff87d503941e.pdfIn PDF document text
    • https://cdn.sqhk.co/jojojidatun/dhhii5a/pogasiwit.pdfIn PDF document text
    • https://cdn.sqhk.co/zulatobi/bByihui/dafub.pdfIn PDF document text
    • https://wewiruvikaju.weebly.com/uploads/1/3/0/7/130775929/tezifofez-mujipufedu.pdfIn PDF document text
    • https://buwirudoxux.weebly.com/uploads/1/3/4/5/134597973/3a1d7376.pdfIn PDF document text
    • https://buxodofuluni.weebly.com/uploads/1/3/4/8/134875319/8046a3c6fd8c5.pdfIn PDF document text
    • http://libopadu.scienceontheweb.net/53637090267.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418557/normal_5fe97c37e85d9.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://uploads.strikinglycdn.com/files/9d66429c-6e93-453a-8c0b-0eb8f6d90a28/mokoguxivopokiloruvu.pdfIn PDF document text
    • http://duvodix.myartsonline.com/ruzivewuw.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/biwirujaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df9ee7f0-3ac9-41d3-81b1-3a892c56ef30/wurilorovodureko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4793b7ec-5ca7-4792-8750-e781bafc1571/how_much_money_does_a_starbucks_barista_make_a_month.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcaf22e0-ba18-409a-b05a-9ee4077ee8b6/exercices_de_comparaison_et_superlatif.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/kobus.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/wuvufiwi.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/59051063696.pdfIn PDF document text
    • http://totuxivez.onlinewebshop.net/65722208839.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/53721261836.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a0bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A0BD 5604 bytes
SHA-256: c676bad5fa5f7fc207e0a27f2b27433ef4165b7d494fce5c477ce378cdc1bfbe
font_01_sfnt_off0001b3a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B3A3 15484 bytes
SHA-256: 137b77fc97ae9a9c48c2e1f3f9ac78392ca2da3030d19370dc4e2345447dd1f8
font_02_sfnt_off0001e141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E141 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501
font_03_sfnt_off0001f66f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F66F 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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