Malicious PDF — malware analysis report

Static analysis result for SHA-256 efa121b77bca0700…

MALICIOUS

PDF

75.8 KB Created: 2020-12-26 01:06:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f42f9d38d1fc901fae968e13c70450b4 SHA-1: bcfbaef8e5104e99e9584999801478dfddf534d5 SHA-256: efa121b77bca0700b55a365ecb9f2a2f7096fe8e892ed7090ac7a1eb357a28ac
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links to external websites, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to 'online photo editor' and 'dv lottery free', suggesting a lure to trick users into visiting malicious sites.

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://traffmen.ru/strik?utm_term=online+photo+editor+for+dv+lottery+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4409997/normal_5faed44198af7.pdfIn PDF document text
    • https://cdn.sqhk.co/fejavegiwo/4jbSdgh/93430407859.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463300/normal_5fc96d9cdc897.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413590/normal_5fa2cf03c1720.pdfIn PDF document text
    • https://cdn.sqhk.co/bexexoro/ghggbhS/final_fighter_apk_obb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381756/normal_5fafe61633e15.pdfIn PDF document text
    • https://cdn.sqhk.co/xulawajikigi/egjJjh2/crime_botswana_vs_south_africa.pdfIn PDF document text
    • https://cdn.sqhk.co/xolizoxime/1J7Ghix/freedoom_app_github.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461495/normal_5fccbbd9be68b.pdfIn PDF document text
    • https://nogeduju.weebly.com/uploads/1/3/1/3/131398368/timeziverinug-malegopagogade-vufuvuxeja-wekoxowivej.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/1608b560-cf16-4649-babf-3ecd5dc1b209/58237020756.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9af36b19-ffaf-4c6a-bf84-44d298084569/calcium_hydrogen_phosphate_dihydrate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60aec29c-3be3-4b3c-9177-0ff95923955c/90442466469.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_off0000edf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF9 4932 bytes
SHA-256: fe461a3021c4724870bdcc64aa96363b3c9bcd6ecc995e4bb3953424d16e30e4
font_01_sfnt_off0000fec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC2 10320 bytes
SHA-256: c9458252318a533772a9cff276ddd709755e1499fc1bf678854d30f66649f5b7

Open this report in the interactive analyzer, or submit your own file for analysis.