Malicious PDF — malware analysis report

Static analysis result for SHA-256 7700c811aee58c65…

MALICIOUS

PDF

86.7 KB Created: 2020-12-30 17:08:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c385cdbd5eccf46b0482a6450aaf61d4 SHA-1: 974859e76557ee6ae69df0563c2b8916eef0e4c9 SHA-256: 7700c811aee58c6580198a52f7c2bfea716bb831653f940a4e0636c8a9642db9
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically a URL associated with a link farm and a redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The document body, though heavily obfuscated, contains text related to a 'music player app', suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/strik?utm_term=dream+music+player+app In PDF document text
    • https://fidevawane.weebly.com/uploads/1/3/0/8/130814252/4cb5795817126.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393893/normal_5fc45eaf5d92a.pdfIn PDF document text
    • https://cdn.sqhk.co/mofinopedas/imlsjcT/rivafogusigizozawu.pdfIn PDF document text
    • https://fuzifilagowiw.weebly.com/uploads/1/3/4/6/134698760/5e3bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389809/normal_5fa99fc4e8a3f.pdfIn PDF document text
    • https://jegesasep.weebly.com/uploads/1/3/4/5/134502647/5bd090b557bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f8cb31ae9092.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388165/normal_5fba438deacf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383679/normal_5f976a7fadb4e.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/27d522de-d1df-4eb5-9bde-9a4a768515d8/berg_balance_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8d580b1-7671-4d5e-aead-d349b0e2b617/zero_water_filter_consumer_review.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d43f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD43F 5180 bytes
SHA-256: f773a5c0cd0094e770526ef39bfa0485ec0d64c75f813a8b39a462449bfbdd10
font_01_sfnt_off0000e5d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D1 13860 bytes
SHA-256: a8837b241642695266775f5147c1723c41f4e540a76cd3adf5ed477b45a5f9ff
font_02_sfnt_off000111a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A4 11424 bytes
SHA-256: cca3bd83b2c7c737102e63e643e9ae420b118a630d9f1d6343307c41b87645a3
font_03_sfnt_off0001389f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1389F 16168 bytes
SHA-256: bcfecb9fde4b74e4a2b692e15caf305b2988a1cfe4c6386614002e38d35feb86

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