Malicious PDF — malware analysis report

Static analysis result for SHA-256 a018b0d2a73209cb…

MALICIOUS

PDF

85.8 KB Created: 2021-05-16 16:05:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00033267310536f2d10a894d38aceb12 SHA-1: 3ac96d090a50d6bd51b149a13d9898ae1880e5b5 SHA-256: a018b0d2a73209cb1e8cdb99dd08533ea49597f798e74cc4152a1751ff4ed361
96 Risk Score

Malware Insights

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

The file was classified as malicious by ML and ClamAV, indicating a high likelihood of malicious intent. It contains embedded URLs, one of which is flagged as potentially malicious, suggesting a phishing or malware distribution attempt. The PDF structure and embedded content are consistent with spearphishing attachments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 4

  • 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
  • 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://cdn-cms.f-static.net/uploads/4478655/normal_60234131a0ac9.pdf
    • https://cdn-cms.f-static.net/uploads/4374002/normal_605efcb403887.pdf
    • https://cdn-cms.f-static.net/uploads/4390661/normal_6046792a9cdb7.pdf
    • http://fredo.run/69239551963hsgmh.pdf
    • http://about-central.com/75313527200lulb7.pdf
    • https://cdn-cms.f-static.net/uploads/4426280/normal_601d0a27bfa6a.pdf
    • http://youla-24.cc/57961393698jadc6.pdf
    • http://bezigex.iblogger.org/year_2_maths_problem_solving.pdf
    • http://hesap-al-sat.com/how_to_identify_grammatical_errors_in_sentencesh3x68.pdf
    • https://cdn-cms.f-static.net/uploads/4378390/normal_600ea67f853d3.pdf
    • https://static.s123-cdn-static.com/uploads/4406481/normal_5fdcd49be7391.pdf
    • http://bunnygummy.ru/best_american_history_books_for_middle_school1ppen.pdf
    • https://static.s123-cdn-static.com/uploads/4461229/normal_5fce242cb8a5a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://feedproxy.google.com/~r/wb/ENAH/~3/0IJhScypsXo/wb?keyword=why%20isn
    • https://s3.amazonaws.com/sajezife/17980876397.pdf
    • https://uploads.strikinglycdn.com/files/48f3d892-60aa-4d4a-9416-be71dac5ffaa/schwinn_airdyne_pro_cost.pdf
    • https://s3.amazonaws.com/salade/photoshop_invitation_background_designs_free.pdf
    • http://wupewujivijulo.epizy.com/dupovukotuzuz.pdf
    • http://buzuvemujogumob.epizy.com/16640230302.pdf
    • https://uploads.strikinglycdn.com/files/8aa84ec0-0b78-42d0-9b47-5947be1e7a0a/fujevatedipoga.pdf
    • https://uploads.strikinglycdn.com/files/0f577ce2-8cff-48cf-9afd-66f4d3fffd2d/korogot.pdf
    • https://s3.amazonaws.com/befafuni/xunuzezogelezafiwefedev.pdf
    • http://tixaxit.epizy.com/36022090125.pdf
    • http://wofajigu.rf.gd/zerowosuvop.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f03f.bin
c1c06d522e0a5efe0754701824a7aec0af69045b808aa18e1b1f9b488f579f7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF03F 5504 bytes
font_01_sfnt_off000102e5.bin
f637a89180103d17d0f872b03f99cb7ed76fac7482e283b155541c999e9a8add		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102E5 2144 bytes
font_02_sfnt_off00010cf0.bin
b2c08a637d94a4864cd7930e3099400a82e8e83e47570ff41e710ceae9be49aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF0 11392 bytes
font_03_sfnt_off000133e3.bin
52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550		 pdf-font-stream PDF embedded font (sfnt) at offset 0x133E3 16036 bytes

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