Malicious PDF — malware analysis report

Static analysis result for SHA-256 09adef0f15f2a75d…

MALICIOUS

PDF

75.8 KB Created: 2021-01-01 11:40:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 592c7552a348c59b961cd16da079c2c5 SHA-1: 6b3dce3ab8a2e1704e4435152f81e6a651c9f501 SHA-256: 09adef0f15f2a75d20f7e6e38ab2b3206f1c3f2f8e6aa662becbf035223fd9d5
164 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. It uses an invoice-themed lure. 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 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://traffnew.ru/123?utm_term=business+ratios+and+formulas+a+comprehensive+guide PDF link annotation
    • https://buvijolijesikuv.weebly.com/uploads/1/3/4/6/134602818/rojibunefururexon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418199/normal_5f9fa5877b329.pdfIn PDF document text
    • https://mozejoli.weebly.com/uploads/1/3/4/8/134864480/sanukosapaminumikefi.pdfIn PDF document text
    • https://sapigufebo.weebly.com/uploads/1/3/4/5/134592603/eb97a7109a8fe4d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446776/normal_5fce9c8e0a095.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b547ca27-98ad-4112-bb1f-ea373568c3d0/drop_table_sqlite3_python.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6cae095-b736-44d5-b8f7-ca37404d2c2e/mera_jhumka_utha_ke_laya_song_downlo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7704ffa-b0ba-4635-a3a1-e0b9c24c1744/6065271238.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8222081-4558-42b1-abb3-641eb10f22d0/pitagikeji.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/27510105429.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8668b867-9779-4426-a17f-81dd006a4d4e/neledalamemaza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/763c7246-1764-45cb-99b7-c00e0133dd8c/iron_man_2_poster_official.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_off0000ebc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC3 5680 bytes
SHA-256: 365a98d6407fe85cf68577109586fe88b4a77df5cced196a51a87709cd538f5e
font_01_sfnt_off0000fef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF9 10228 bytes
SHA-256: bacbf9bf73bef0f28f147daa6b853b08a5436dc8e0aef6ff4891a7f3b3cc5768

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