Malicious PDF — malware analysis report

Static analysis result for SHA-256 faee31a53fb326ad…

MALICIOUS

PDF

71.4 KB Created: 2020-11-11 09:28:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f9e2b9ee9fa96c7d2ccfd28e44ff126d SHA-1: dcc948799e2181bde1704b8e0a5878c638551236 SHA-256: faee31a53fb326ad2ca1f0acbbfc2493bfe2dc271ce58ae02a8da8f87072fb2e
214 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 and routes users through malicious redirector infrastructure. 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
  • 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://ggtraff.ru/123?keyword=big+summer+blowout+quote In PDF document text
    • https://zegimobigew.weebly.com/uploads/1/3/4/3/134313375/xiwoku_suvajemo_lufot_didava.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371786/normal_5f9de91183da1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451549/normal_5fa203ac9d6cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444626/normal_5fa49f493d66b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370088/normal_5f8acae565ddc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377112/normal_5fa91cc5812b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485005/normal_5fa7c3a183348.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401519/normal_5faa252049139.pdfIn PDF document text
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/bamadekob_gujonifatujura_bobeguminevoma_razalo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367674/normal_5fa3eabcc37e2.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/felasorarabipis/exercices_accord_participe_pass_avoir.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/right_angle_screwdriver_walmart.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/lebejedoxuma.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/unblocked_games_plazma_burst_3.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/dujixafofeda.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/88427751421.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFD4 3076 bytes
SHA-256: e4f641a6971d291a367078cc17becefac5cd32d03b6d707e84ae8ffd8c02b8ee
font_01_sfnt_off0000dac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC8 5204 bytes
SHA-256: f23034f53cf4d638231bf2e3d702c93af117fa8a5235bd831498da89f48ff9ad
font_02_sfnt_off0000ec7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7D 10528 bytes
SHA-256: 54dacba31342b99da59778eb14d2fd8beb7b3c38ccc629a99562bdcf246ff7f9

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