Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcae71beae368d0a…

MALICIOUS

PDF

66.4 KB Created: 2020-12-16 05:05:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4e23845a8946b45f56e9f0ffae5292ab SHA-1: e837b33ad3e2cba7fab97d032398b04a334e1fbc SHA-256: fcae71beae368d0a545971865e5fc82b5314cf69f58f3f64057715c9984538c4
214 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains text related to 'Lenormand man card combinations', likely serving as a lure to entice users to click the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffmen.ru/123?utm_term=lenormand+man+card+combinations In PDF document text
    • https://lomofoxagut.weebly.com/uploads/1/3/4/5/134524577/33a60c.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/mubemutolewe/45547580226.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc18b3cc89e1c4b8fc2ff4a/t/5fc55c5218e72e5fdb8aed86/1606769748062/kasuwavodavepali.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc37d0aec917750a3e81c42/t/5fc4ea8a3c02f22b9da6f218/1606740619793/jukawusivivuxupefewurufo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3a01a8ef7301f8b21e4b4/t/5fcfb04b05f6f27807657c60/1607446613731/rotator_cuff_surgery_recovery_video.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/72285867858.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd02c92edfcd2bda92345e/1606222537841/unclaimed_property_act_nebraska.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fceea21cd9942793f246b3b/t/5fd1a94eebc7ce75e8af6dd3/1607575889722/xodujilaw.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe0551173fb5383b68c16d/1606288721577/bakersfield_californian_newspaper_archives.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc39b6c5687f52b6b922f37/t/5fd198a1ef89ac6683719e97/1607571617665/66826215211.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc514d0d26ff1194f8ee356/t/5fceaa626df3f351a6696efc/1607379554972/lukafezomakemene.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6666e27a199023adae7b0/t/5fd17d83d97b572b89d146a0/1607564675582/jasivilijejasujedime.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2eceac6d96458362f573e/t/5fc4e6a03c6ccf69f3f88997/1606739619168/78257309021.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_off0000c6ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6BA 5132 bytes
SHA-256: 5eff3cf6134c7eb1e5275e9dd28fac838f4a288ec145b56002f25b33ca04b195
font_01_sfnt_off0000d80f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD80F 10848 bytes
SHA-256: 8353dab237281dbcfc516c4f1f33af12a071004e8acd4a98b47267ff9bced6b9

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