Malicious PDF — malware analysis report

Static analysis result for SHA-256 abc63c4bd5d2910a…

MALICIOUS

PDF

76.3 KB Created: 2021-03-06 12:52:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0d6bf2e2615d3f0800075e5bd619cc92 SHA-1: 6e194f0703b48acf313da3fa9e5055a44acc7efc SHA-256: abc63c4bd5d2910a0fd3bba146004e2f11fddc6b41bc29085f717a19fca75820
126 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 0.9264

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://fokemale.ru/award?keyword=summoning+the+dark+lord PDF link annotation
    • http://begemot.space/fokipukekezafemuwusevlgxng.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383566/normal_60183b0c79a00.pdfIn PDF document text
    • http://wosurijegu.22web.org/lalolawowivo.pdfIn PDF document text
    • http://wabukuxinezu.22web.org/equifax_unfreeze_credit_report_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378848/normal_5fec23d75f0d7.pdfIn PDF document text
    • http://flymoney.net/jeguzaravezixipefuxn2b2.pdfIn PDF document text
    • http://itravelgr.com/dell_latitude_e6530_user_manualexql3.pdfIn PDF document text
    • http://sodaapp.club/jazun6brin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365608/normal_5fdd485fe0d11.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366632/normal_5ff3718988cef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414848/normal_5ff55da352fd9.pdfIn PDF document text
    • http://milesnires.xyz/super_mario_bros_2_theme_sheet_music8ahp7.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/rebomedug/college_algebra_practice_test_with_answers.pdfIn PDF document text
    • http://jugikan.epizy.com/boy_like_you_kesha_free.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/school_banner_design_template_vector.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/fexijuduwiv.pdfIn PDF document text
    • https://899154e9-876a-4ab4-94d5-c8ef2aed10f2.filesusr.com/ugd/dcf9ad_7ee09b328b954b85903cfad873151a8c.pdf?index=trueIn PDF document text
    • http://tononade.rf.gd/learn_korean_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/18334868566.pdfIn PDF document text
    • https://926da24b-d3df-4aea-ac1b-ebdf7359a9e7.filesusr.com/ugd/fef925_67b20927468a4472b94c3cb25b6044dd.pdf?index=trueIn PDF document text
    • https://7e073981-ad1c-4081-8dc0-76946ba36063.filesusr.com/ugd/c4f63d_6da984735ece4fc0bc2c5579c01e9716.pdf?index=trueIn PDF document text
    • https://60659a61-a27b-47ea-8eac-a81775c62269.filesusr.com/ugd/7a7fb1_c11c1f1212ed4843a0f863318380fda2.pdf?index=trueIn PDF document text
    • http://nejuzuwesikodik.rf.gd/the_game_changers_firefighters_diet.pdfIn 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_off0000f7bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BC 5228 bytes
SHA-256: d56657b130e8b45d7f37f78add56883fbf530cd4785cb276e144fdb5a47c0a4a
font_01_sfnt_off0001094f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094F 10760 bytes
SHA-256: 5ccfa5355682d6839ed0dfc2e239f942956a3790b3e4bcf6e21020127b7b15a4

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