Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad1dd629a19e2bff…

MALICIOUS

PDF

106.2 KB Created: 2021-05-24 22:17:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7dd4ba637204804501a038445e9e22db SHA-1: b84aa0e9a1ce900d4ea50b949a37a36c09681687 SHA-256: ad1dd629a19e2bffb8af77d1ae94375c59e178c34a3b6082aaad81debf77a7fa
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 0.9994

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://jottigo.ru/strik?utm_term=roblox+id+code+for+rap+songs+2020 PDF link annotation
    • https://fewefemuge.weebly.com/uploads/1/3/4/3/134372507/godaxadipe-pejijajo-laxivukujezij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413369/normal_6039cac0bb851.pdfIn PDF document text
    • https://furureseseruwa.weebly.com/uploads/1/3/4/4/134481841/ravukukozife.pdfIn PDF document text
    • https://posoxunek.weebly.com/uploads/1/3/4/4/134460252/2196874.pdfIn PDF document text
    • https://nekatiru.weebly.com/uploads/1/3/2/6/132695473/6588869.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382789/normal_6033bbcac5fd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482402/normal_60326170616c6.pdfIn PDF document text
    • https://zisatusomet.weebly.com/uploads/1/3/4/8/134872515/9d934f8.pdfIn PDF document text
    • https://gamaditer.weebly.com/uploads/1/3/4/5/134583337/ad011e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412573/normal_603500b417410.pdfIn PDF document text
    • https://vibusipapomokij.weebly.com/uploads/1/3/2/6/132682711/jiforejiwomusus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lanubili/37798200282.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cf98d31-50d3-4a11-be24-ff2bfb10991c/88039353045.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/6093736581.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/89662174188.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76121517-f8ef-4586-88aa-3069d334eee3/contrato_de_arrendamiento_local_comercial_formato_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cf92d2b-34c5-4ae4-b7b2-6781d1d80b2e/do_sanyo_tvs_have_a_reset_button.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/bloodstained_ps4_trophy_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/92555515041.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/apostle_paul_history.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_off000134a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134A9 3988 bytes
SHA-256: 70a7ba249bea37ef35fa1c18edb02e8c56714ed14a3ac6e9245ea329f2eb2b74
font_01_sfnt_off000142ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142CE 5812 bytes
SHA-256: ab022776a6c074f2997ba14dde57016a2c079855f03bf0bda045248e93efe0b9
font_02_sfnt_off000156ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156AC 14312 bytes
SHA-256: b7b7a26948012f5c585eceff1728ffa8a61e0fb8dd5281490347a94ba1412016
font_03_sfnt_off00018449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18449 16036 bytes
SHA-256: 35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f

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