Malicious PDF — malware analysis report

Static analysis result for SHA-256 10bcf456b10d98ea…

MALICIOUS

PDF

69.2 KB Created: 2020-12-28 06:47:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e99e9e4731bca8ffa53db05d9ccf78d8 SHA-1: 8d4fec1842b698e2a9efcad9f874eed424030142 SHA-256: 10bcf456b10d98eac56ae030d5f91013dabd9a1777384d25679933f44e66c295
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'https://cctraff.ru/123?utm_term=bux.life+roblox+generator+no+human+verification'. This URL is presented in a context that suggests a lure for users interested in game-related generators, indicating a phishing or malware distribution attempt. The presence of numerous other PDF links further supports the classification as a link farm, likely used to distribute malicious content or engage in SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://cctraff.ru/123?utm_term=bux.life+roblox+generator+no+human+verification In PDF document text
    • https://giretalude.weebly.com/uploads/1/3/4/6/134677333/2849215.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/HmghieB/gartner_edr_magic_quadrant_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/gadukupuwe/k09vggc/smart_screen_recorder_pro_apk_download.pdfIn PDF document text
    • https://xowunaxevome.weebly.com/uploads/1/3/4/6/134679103/6853631.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f96f8cd42342.pdfIn PDF document text
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/wupusawokisexomuga.pdfIn PDF document text
    • https://jedogivezuse.weebly.com/uploads/1/3/4/8/134862252/muvudegenukegu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393018/normal_5fb93ca4dbb90.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/98854273707.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/abcya_2018_bad_eggs_2.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/juzewikel.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/26582314546.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/pujabafidifuzolowujudi.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/javibapole.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/pukojomakakutonogevate.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC926 5468 bytes
SHA-256: e4e801d663f6d61c1fff1039018e3eba659bde396b7a89f0020c0adc0dea6873
font_01_sfnt_off0000dba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA9 2092 bytes
SHA-256: 9fcfd2b2c12c9d480c0beec3ee39f05b9e518edc5177a7a5fcc68dff0371f8a2
font_02_sfnt_off0000e549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE549 9964 bytes
SHA-256: 9d15d23036803452e1eb6939976dc0e3e901d54b454609fef86f205087ece8b3

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