Malicious PDF — malware analysis report

Static analysis result for SHA-256 f12b260fef5c9e33…

MALICIOUS

PDF

134.6 KB Created: 2020-11-12 22:10:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: cbcc71adc5c42798de993ff983ab4f1b SHA-1: 8d0fa668ed20727c9d84ec2d82e86a8a9ff7001a SHA-256: f12b260fef5c9e3311e8e0c352cc08702da2b2531a40419e69d81b15afba9b32
212 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to a known malicious redirector. The heuristic firings indicate it's a malicious redirector and part of a link farm, suggesting an attempt to distribute malicious content or phish users. The ML classifier also flagged it with high confidence. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9502

Heuristics 4

  • 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.
  • 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/aws?utm_term=discussion+lab+report+potentiometer+matriculation In PDF document text
    • https://giminabev.weebly.com/uploads/1/3/4/6/134601645/tifejixizifoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366057/normal_5f93583117499.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369796/normal_5fa41bc01fdc3.pdfIn PDF document text
    • https://babilazumi.weebly.com/uploads/1/3/4/6/134666759/bogok-donisuxavofub-wonafiwevejij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485580/normal_5fad3b920d208.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/bank_exam_syllabus_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/loxowozesovatudali.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/demoxokekarakatu.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/44112193958.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2e6d2e6-a5fe-413b-927a-5067312862ab/a_raisin_in_the_sun_study_guide_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/sujemikexegedujegevosofek.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/watch_the_office_season_8_123movies.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/download_idm_full_crack_tanpa_registrasi_kuyhaa.pdfIn 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_off0001c2b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C2B5 9180 bytes
SHA-256: cfbb865e0f7b8261bea7279a308df075341d62414a5cefde8c8fb4e3564687ac
font_01_sfnt_off0001dc3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DC3B 3016 bytes
SHA-256: f89851c503be38a74f0186998e3658527e1b8c39353dc822d86b1c1a98b181ed
font_02_sfnt_off0001e700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E700 5100 bytes
SHA-256: 5b7cf3bcb905b8d916aba9a68ac473ad72e4c0310cad6135f816bab88ba86356

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