Malicious PDF — malware analysis report

Static analysis result for SHA-256 6329d37e598ce702…

MALICIOUS

PDF

73.2 KB Created: 2020-12-21 11:55:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4e7cf8661818026cbcf94554be2b4660 SHA-1: 9327a407114253488c9fbfe3d87ee56fab7e369a SHA-256: 6329d37e598ce7026e4ea9d431e1e82aa6355360b7b35664d3abfe6a66f29710
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 0.9998

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://trafffi.ru/strik?utm_term=w3schools+javascript+function PDF link annotation
    • https://fojigexo.weebly.com/uploads/1/3/4/2/134235048/3951624.pdfIn PDF document text
    • https://dupizonax.weebly.com/uploads/1/3/1/3/131380343/xetivuzofututij.pdfIn PDF document text
    • https://fadufavibog.weebly.com/uploads/1/3/4/8/134889314/giroripilebore.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/rebesudanolo/early_colonies_and_settlers_crossword_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5b578085bf90c0e1e0035/t/5fd0197a125f6a657a40b44d/1607473531267/cordial_meaning_urban_dictionary.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5923088c99b6d37c70c4d/t/5fc86a45217b3604eddc0ef6/1606969926613/jellyfin_android_tv_login.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/southern_live_oak_tree_tattoo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05e27e8e-6e60-43ef-8d02-27cacd98ee37/frozen_soundtrack_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb4ced5d-7c01-4e67-9615-89974e031cf7/1966_mustang_shop_manual_download.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/bookman_gothic_font_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2983b9955c744b5466208/t/5fcbe1a39cf56e0e8b1e6204/1607197092207/xojidovefixatabuzegajamum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e69e6674-70d5-49d5-9b74-33e59dba582f/81122820358.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0bcfb2e537a05ef083615/t/5fc1522c9ee0f32b8783fcc7/1606505005826/pavibe.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_off0000cc1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC1D 5416 bytes
SHA-256: b296bf0de50bb73623ebfdcdb6c5b19f80db5bb5977677e34269575f911fe468
font_01_sfnt_off0000dea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA0 10532 bytes
SHA-256: 0ba017801dc5963625c8bd0f8df303ecebb0e6c4ffe7658cb423ae5e55e593ac
font_02_sfnt_off000102f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F9 16164 bytes
SHA-256: d781c508aaf473e50263a6aabc3f4161b7fa10724c54bb8d35addee38a7f1c44

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