Malicious PDF — malware analysis report

Static analysis result for SHA-256 574dab9ddc7a75c5…

MALICIOUS

PDF

78.8 KB Created: 2020-11-09 21:58:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34af45febef70450c0e9762d83c32b12 SHA-1: 93c48c180ff32ea844fe0c5f40a763351c309725 SHA-256: 574dab9ddc7a75c5259830b07df6bf5d1205e74e53d30236a347b4d062dfce86
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are likely part of a link farm designed to improve search engine rankings for malicious content. One prominent URL, 'https://trafficel.ru/strik?keyword=watch+the+lion+king+2019+full+movie+gomovies', suggests a lure related to popular movie content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/strik?keyword=watch+the+lion+king+2019+full+movie+gomovies
    • https://firupewuvub.weebly.com/uploads/1/3/4/3/134330425/6197399.pdf
    • https://cdn-cms.f-static.net/uploads/4378852/normal_5f8af7dac8d14.pdf
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/c124fd.pdf
    • https://cdn-cms.f-static.net/uploads/4474446/normal_5fa77987e2fa2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e66fc5bf-67d7-48ab-abd6-584a6881b48f/74519127184.pdf
    • https://uploads.strikinglycdn.com/files/5c46c52e-a833-48b2-a15b-3c55e4815bbc/minecraft_java_edition_download_apk_android.pdf
    • https://uploads.strikinglycdn.com/files/50607e91-5e62-4584-a5cd-6a3a65b6ba01/linking_verbs_song_video.pdf
    • https://uploads.strikinglycdn.com/files/bfb8fa25-25a1-4134-95ba-d68a1be44c4e/mijexediwesujefajubefa.pdf
    • https://s3.amazonaws.com/fifuto/desert_environmental_issues.pdf
    • https://uploads.strikinglycdn.com/files/27d4797e-2e80-400c-a72d-6ed6cfbedad6/31154560998.pdf
    • https://uploads.strikinglycdn.com/files/0a43a23a-83f8-4ae4-8d68-3178ea2093e9/wikuzototupegumi.pdf
    • https://uploads.strikinglycdn.com/files/f858cb4e-9b7d-4b74-80bc-a923a36b7a1e/kokiwefisiremeja.pdf
    • https://uploads.strikinglycdn.com/files/f3d20e62-45c1-4b3a-a186-b3072bdd310a/uc_daap_supply_list.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f464.bin
9b3a10db9e89f149de92c430bbc8b1665a57b945c51e7b48e075c34ffafc685a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF464 5820 bytes
font_01_sfnt_off00010830.bin
250a6e3033be9f7492762142f0e441a94e332ea7f2070a130a02ce1d218a047b
pdf-font-stream PDF embedded font (sfnt) at offset 0x10830 11312 bytes