Malicious PDF — malware analysis report

Static analysis result for SHA-256 3408bf9eb4b19fad…

MALICIOUS

PDF

70.5 KB Created: 2020-12-02 10:43:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e55dc63293d528c323a520597d8a18b0 SHA-1: 3393bad41656530296a6abb8289d3b462b7efd13 SHA-256: 3408bf9eb4b19fad228c352cc630642b1ec1248972dd85080ffa60af98d83ebf
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a significant number of external links, with many pointing to Weebly-hosted PDF files, indicating a potential link farm or phishing campaign. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of numerous external links is a strong indicator of malicious activity.

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
  • 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://trafftec.ru/123?utm_term=wonder+woman+new+52+vs+rebirth PDF link annotation
    • https://wipaluxeko.weebly.com/uploads/1/3/4/3/134346688/8524698.pdfIn PDF document text
    • https://fivalamividow.weebly.com/uploads/1/3/4/8/134857099/zedekewedaken.pdfIn PDF document text
    • https://dupizonax.weebly.com/uploads/1/3/1/3/131380343/kejakeb-guvoribupuge-livilukeladepi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425916/normal_5fa076b759584.pdfIn PDF document text
    • https://raralulewuk.weebly.com/uploads/1/3/4/4/134478892/9392199.pdfIn PDF document text
    • https://genamimiwovem.weebly.com/uploads/1/3/1/6/131636881/fujowidekuzi_fokutuxeg.pdfIn PDF document text
    • https://judemozosuduj.weebly.com/uploads/1/3/4/3/134306717/ridiwagufasuv_xixosuzex.pdfIn PDF document text
    • https://xijoxamapapi.weebly.com/uploads/1/3/4/3/134337958/f1615cec29.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/regufojalojaza/luminar_3_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/wbbse_physical_science_book.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/91824758548.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe03feeaf37e3b64626f76/1606288384537/michael_buble_jingle_bells_live.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/nobigisubafod.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_off0000d268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD268 5592 bytes
SHA-256: 68f687ae052d6d696c57f547df7fcb8f4a5a218f9771f93a355b2e78c2282c9c
font_01_sfnt_off0000e562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE562 11252 bytes
SHA-256: 0aa7a2632996ec6ab69950d8a342dc2e676fe0dbfdd623a6a5d3ce92bec828ef

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