Malicious PDF — malware analysis report

Static analysis result for SHA-256 04505a572b7fb916…

MALICIOUS

PDF

68.4 KB Created: 2021-05-14 00:27:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da936c35ec0c03cf470daf734d171748 SHA-1: 97e570828d3e03f19d1910618142d05e479dff48 SHA-256: 04505a572b7fb9166be44053729038b11e464b475ce12471eb4607c0e03ce4fe
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, with one prominent link pointing to 'https://jumiwimov.ru/strik?utm_term=how+to+win+the+lottery+book+pdf'. ClamAV also detected the file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', indicating a phishing or trojan payload. The ML classifier also flagged it as malicious. The document body, though heavily obfuscated, suggests a lure related to winning the lottery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8029

Heuristics 4

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jumiwimov.ru/strik?utm_term=how+to+win+the+lottery+book+pdf
    • https://sizuwebon.weebly.com/uploads/1/3/0/8/130814729/effa18.pdf
    • https://cdn.sqhk.co/zenipijujate/j8iejfw/kajuriku.pdf
    • https://sepetumeba.weebly.com/uploads/1/3/4/6/134601334/vefagifutijo-sorarexuwasubev-xajaros-duvavapuveguga.pdf
    • https://sanokigoj.weebly.com/uploads/1/3/4/8/134863934/winogisa.pdf
    • https://lututigit.weebly.com/uploads/1/3/5/3/135335707/c1ae2d.pdf
    • https://cdn.sqhk.co/ferobisuw/bjehcUz/da_nang_tourist_map.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/bb2f19a5-47b4-48aa-a383-73d58745f0fd/widopafaguborukiw.pdf
    • https://uploads.strikinglycdn.com/files/c7eedb60-997e-4572-bc3e-fc9604f7cebc/viniromon.pdf
    • https://s3.amazonaws.com/womirofop/xokaweved.pdf
    • https://uploads.strikinglycdn.com/files/a6e3e283-f334-4fde-8ecb-6f3ddfa08fd0/sharp_xe-a207_manual_espanol.pdf
    • https://s3.amazonaws.com/xidazeze/59893356163.pdf
    • https://uploads.strikinglycdn.com/files/680e2e45-94e0-48b0-9b95-0de882fd2a27/6833908738.pdf
    • https://uploads.strikinglycdn.com/files/9ac896fc-7b86-4bee-af65-bb396ed3c590/sokose.pdf
    • https://uploads.strikinglycdn.com/files/3232ad87-a939-4b11-9642-8398327ea756/82952622771.pdf
    • https://uploads.strikinglycdn.com/files/247e9953-4956-4942-b945-fcc458912642/57550718799.pdf
    • https://45180a89-8b92-4d54-a4c6-cdf0ad6af3c7.filesusr.com/ugd/2b98a3_f5a0503cfe6f406787071d18b136d290.pdf?index=true
    • https://uploads.strikinglycdn.com/files/59a76370-6362-467d-a51a-0fbf01b885fb/guns_germs_and_steel_summary_by_chapter.pdf
    • https://s3.amazonaws.com/xurixado/nubejepitiguw.pdf
    • https://ba85394b-11ac-4ca4-926b-74ca936c52e1.filesusr.com/ugd/5ccfc8_cfbabe213ba54c6fab11abe42305ba81.pdf?index=true
    • https://uploads.strikinglycdn.com/files/22aaafae-69f6-47dd-9b6c-e53ba6b5a873/what_are_some_fun_quiz_questions_to_the_impossible.pdf
    • https://s3.amazonaws.com/zemigiduwagafu/my_little_pony_sims_4_mod.pdf
    • https://uploads.strikinglycdn.com/files/42f063b1-88a0-4b90-8b73-2088f0fd09d7/does_a_guardian_ad_litem_get_paid.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001029a.bin
cd7ebe10cd96d437fe155a948e6aad9dc768543c52775ba9370254bf18b98398
pdf-font-stream PDF embedded font (sfnt) at offset 0x1029A 5100 bytes