Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba83f02cb506a52c…

MALICIOUS

PDF

76.6 KB Created: 2021-01-19 04:34:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 383a5345280b1c65f7b9a2594523bdd0 SHA-1: 907ec6ce1840d6f7fef10b9627b187739f616687 SHA-256: ba83f02cb506a52c206b7f37872e7f3c30326142daeb48c246bd331b487b1995
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The presence of numerous external links, many pointing to Weebly and other file-hosting services, suggests a link farm or phishing campaign. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful 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
  • 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://trafficel.ru/123?utm_term=the+mighty+arms+of+atlas PDF link annotation
    • https://pamimimafe.weebly.com/uploads/1/3/0/7/130775080/vawavudaraw.pdfIn PDF document text
    • https://cdn.sqhk.co/fedelubu/fjaighj/corneal_cross_linking_recovery_time.pdfIn PDF document text
    • https://xojuliwujugiseb.weebly.com/uploads/1/3/4/3/134388488/befaxosavesagu.pdfIn PDF document text
    • https://site-1193591.mozfiles.com/files/1193591/thomas_calculus.pdfIn PDF document text
    • https://cdn.sqhk.co/kibizatududo/hjDxihi/zarubuvagorodesefonawiz.pdfIn PDF document text
    • https://didonomomosizol.weebly.com/uploads/1/3/4/8/134892758/7f23495.pdfIn PDF document text
    • https://wugupuvexiso.weebly.com/uploads/1/3/0/9/130969254/sozopisukeku.pdfIn PDF document text
    • https://site-1171153.mozfiles.com/files/1171153/fb_login_facebook_m_touch.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/97728979668.pdfIn PDF document text
    • http://kupavojos.epizy.com/hilliard_city_schools_state_report_card.pdfIn PDF document text
    • http://palipesokugukux.epizy.com/lufozaluwojexu.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/spotify_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/burnout_revenge_ps2_iso.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/toto_africa_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/37262795588.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/akuvox_it83_user_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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD85 5232 bytes
SHA-256: 5732549f8729234115dabb9f9590b3f32481e24fe6388932f752fe72929fe264
font_01_sfnt_off0000ef28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF28 6664 bytes
SHA-256: 6dc2d9045770c40cfb4c26851effaa29e4896a23fdbf86caf7cd1f4b0e791eb9
font_02_sfnt_off000100b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B1 10716 bytes
SHA-256: 58f9bcceda6828afdbbe8a8059fc03ba311ab45dbad6e04c6f87f1bb4fa1906f

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