Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba0ae9cca6381262…

MALICIOUS

PDF

72.8 KB Created: 2021-05-26 16:40:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 50e332bb73c989fa46232ebcabea02cc SHA-1: 75be9f031e584b1398e5ed105e2e0f18db17ab7a SHA-256: ba0ae9cca6381262a862e661f475c38e592f8222b4c9f68fbdb9d44655e0ae33
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xajibur.ru/wb?keyword=how%20to%20fix%20a%20hp%20printer%20that%20is%20offline PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408319/normal_5ff96e3ed123d.pdfIn PDF document text
    • https://gufagopa.weebly.com/uploads/1/3/4/6/134660265/kulufonumuverusebi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391602/normal_5fd0e99a42191.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409403/normal_6038ed55bc697.pdfIn PDF document text
    • https://doxefifuz.weebly.com/uploads/1/3/0/9/130969363/438e9c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466376/normal_604fd1300390b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447669/normal_6003d333968c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495050/normal_5fe02120243c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482869/normal_5fcc0ccb8b5d5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb50f8d8-2099-4d92-a4d9-439157a940a7/nelokateporixinimigilom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/033bc394-3dd9-40ae-8150-a3ce2f4050d2/best_marcy_weight_bench.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f84de4f2-70bd-4ffe-9ab2-6ff9de7da012/how_to_buy_certified_mail_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd4cf216-2bab-4996-b38a-85a35af1ed4f/wiganuravikuvatoxetomomob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26dce6d4-de4c-4b47-86d9-e91dde754ac0/how_much_cost_to_study_dental_assistant.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32990720-dc15-4652-8a8d-b8dcb7a373f7/31043146077.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fb8ec71-22f7-4eef-b54d-260429ed165b/week_by_week_math_essentials_grade_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c72a0817-e3ea-494a-be77-a9f65a8bf4ab/31020255845.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be47cb71-d0a8-476f-8d43-4425fe2cb210/what_is_a_plan_in_project_management.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87084faa-1678-4eb5-bb0c-c21c4033c5c6/tixuwelaxijiwamu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d86a7e78-1df4-4302-91e9-02024718ece1/76925640056.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc38b67a-c2e9-4129-ba06-d6ef65ca3efb/24735357881.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE177 5108 bytes
SHA-256: e8474e6ba56104312c90a1328dbbc648db90e116c3229b855fefcec7af443302
font_01_sfnt_off0000f2e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E9 10176 bytes
SHA-256: b5dd2b298f00f32fecf8d28e99b8b0a3ab87487cb2839624107b068bdd31cd8d

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