Malicious PDF — malware analysis report

Static analysis result for SHA-256 1980b2887b8a26ad…

MALICIOUS

PDF

77.6 KB Created: 2020-12-31 00:58:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 0c75ade210bf0b123ab211daaaf80434 SHA-1: 3bd1e8e11e615ab5a71a7dcd7c60cbe9cd0cac33 SHA-256: 1980b2887b8a26ad82c41998db643d4a81d56cf13e695d3f2ce9405506db5342
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The presence of numerous links suggests an attempt to direct users to phishing sites or download further malware, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?utm_term=billion+builders+mod+apk+money In PDF document text
    • https://wexivupesowapab.weebly.com/uploads/1/3/2/7/132712225/xenazagasuveruri.pdfIn PDF document text
    • https://xosofanukofupa.weebly.com/uploads/1/3/4/8/134879033/00e3cefe62976bb.pdfIn PDF document text
    • https://xumuxurubaxuk.weebly.com/uploads/1/3/4/5/134501003/zajobewefimabili.pdfIn PDF document text
    • https://kifobanirijo.weebly.com/uploads/1/3/4/5/134595275/43527aa70ed0.pdfIn PDF document text
    • https://mabalavorejeg.weebly.com/uploads/1/3/4/7/134769590/aa9a59.pdfIn PDF document text
    • https://sibojigejediwij.weebly.com/uploads/1/3/4/6/134606131/xakazexuf.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/tutasujal/rivukukukimuxumusukitov.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/adobe_reader_dc_version.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/xojiboj.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/57238675245.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/despacito_ringtone_iphone_mix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c11fd90-b61d-4bfe-bd2e-6bcf4312d87a/psp_cso_games_download_mediafire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90f00f6d-920a-47f0-b547-c6d1daf235a8/visejobajoma.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/go_math_book_answer_key_grade_8.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1F 5460 bytes
SHA-256: 430b23224db548814901960eec1b6e8f0703b148e492664f8f636c153bbd771c
font_01_sfnt_off0000f097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF097 10420 bytes
SHA-256: 3fd6fd40e6c210251b22522eb16ff41ee40ebbfb1efec513ddcce4f9fb3ac18b
font_02_sfnt_off0001147e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1147E 16064 bytes
SHA-256: 2bad467a3639e7270d00e4d92b62c633bdf3fca121352097ea953ab0934ed0fd

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