Malicious PDF — malware analysis report

Static analysis result for SHA-256 456c38a25ccc4ccd…

MALICIOUS

PDF

73.2 KB Created: 2020-12-16 23:55:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 1933557d1ffc9bfafb13fd253f78b180 SHA-1: bebabecc521620ad8deed5992bb04e7ec657a4bd SHA-256: 456c38a25ccc4ccd946b32d98bb304582f36f83873ba5e2c33fef7bed24ee102
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, and detected by ClamAV as Pdf.Phishing.Trojan. The presence of numerous external links, particularly the one to 'traffine.ru', suggests a phishing or malicious redirection attempt. While no scripts were explicitly extracted, the PDF structure and link farm heuristic indicate an attempt to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffine.ru/strik?utm_term=rough+stone+rolling PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373776/normal_5f8b7c87417d8.pdfIn PDF document text
    • https://litabunor.weebly.com/uploads/1/3/4/5/134522775/zoludiwofiwi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc5559ebd14ff0dd2ba110b/t/5fcc5378260a660a6bd0b2ce/1607226234043/mamakenixagiveladovobizot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7986161-eaa0-44ab-97d8-72465261f9a3/40111072867.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdfca93c6ccf69f3249e10/1606286505940/21667846742.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0086f5b-e15e-4ca8-a463-7d8a35d52659/1_call_away_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/adobe_photoshop_cc_2019_crack_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c71e63a-364b-44b4-85e0-573a4a3536e3/40113226650.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/android_7._0_play_store_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb3e48a2-f37b-4499-9420-7c161e20258b/actividades_autoestima.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/zobakasil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79721207-d896-44d0-9687-6ec00ce0df9c/55201172596.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/marvel_future_fight_cheat_engine_android.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8C0 4360 bytes
SHA-256: 8e39116720438ab5a89a4755e51874f95cab32df5802ff6a41a41fae47d4b0fb
font_01_sfnt_off0000d806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD806 4744 bytes
SHA-256: 4ee3ac262937ad0ddb7dcfffe30b2fd3e066a7715a464c886993c06a0586d9d3
font_02_sfnt_off0000e824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE824 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_03_sfnt_off0000f0b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B1 11068 bytes
SHA-256: d46ad94f021f86e74848d11ac66b5907428fcb01f71ab5ec3fa555d5eebaad88

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