Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4a0e6403b4d45a4…

MALICIOUS

PDF

75.3 KB Created: 2021-03-09 15:47:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 82c0f89379b04e73a01f0f148fd25fb9 SHA-1: 576649b0750a8566b8c7acb7c1e295a3cba30da4 SHA-256: f4a0e6403b4d45a4766808a0fcea1747076cc904458b240b81e1122e31b3c6a5
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/award?keyword=assessment+definition+in+education+pdf PDF link annotation
    • https://nixunirebexif.weebly.com/uploads/1/3/0/7/130776125/fuxamijevukepif-gegotofewizipe-gagefu.pdfIn PDF document text
    • https://cdn.sqhk.co/romilononove/highggU/48137346915.pdfIn PDF document text
    • https://cdn.sqhk.co/rafopaluko/e6ihhdH/80429789128.pdfIn PDF document text
    • https://cdn.sqhk.co/nugofonavuf/cfB2kHV/video_to_gif_converter_free_download_full_version.pdfIn PDF document text
    • https://tekejixebosij.weebly.com/uploads/1/3/1/4/131452745/c75627.pdfIn PDF document text
    • https://cdn.sqhk.co/xolofiwano/hcJY4ha/40924621356.pdfIn PDF document text
    • https://cdn.sqhk.co/xufatirumina/gDurie6/vexilar_fl_18.pdfIn PDF document text
    • https://cdn.sqhk.co/xaranoraf/ajeegfO/amazon_a_to_z_guarantee_request.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetona/tsphbhb/indoor_3d_archery_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/depadukat/Bid4jjj/tojusawofeviri.pdfIn PDF document text
    • https://cdn.sqhk.co/mevazasid/cjiQLno/centurylink._net_email_password_reset.pdfIn PDF document text
    • https://tinabatof.weebly.com/uploads/1/3/0/7/130776088/gafugitadoluviv_madopexokim_boderedojam.pdfIn PDF document text
    • https://cdn.sqhk.co/kufomopinu/CujgAha/worm_webnovel_review.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/f1d2bfcc-4c04-48c5-b45b-9bcb0d6e3148/48963434295.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6778cb9a-14bc-462e-bca6-a7255ab343f0/31_days_of_praying_for_your_future_husband.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0337ddc-97e0-4737-bc6b-a17f73506f4a/how_much_can_a_2012_jeep_grand_cherokee_tow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/123d6533-59e7-4ab5-b8c2-1c9704506b47/xadiruxopudalopox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2b7d822-6f31-4df3-9003-1e7f7fc5685c/girl_interrupted_daisy_chicken.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf48c718-9128-4c1e-b495-89bc14337f39/36944422502.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdafd7a7-7185-4c38-8a06-b565d15a1642/fanuc_robot_o_robotics_programming_manual.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_off0000e8e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E6 5160 bytes
SHA-256: c8cda224ecf19390f53f9e58429056a91ac5fe76b8d503638b83ffb9e78821ee
font_01_sfnt_off0000fa6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6E 11076 bytes
SHA-256: 58899acf3dca2409af33efdd0421cd1372013b536ba0b84492519603a3f95379

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