Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad76127d21b4dfa6…

MALICIOUS

PDF

95.5 KB Created: 2021-03-15 06:24:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ae20090bc3f74cb38e1d4accd00483d SHA-1: b5357182a5d76c4f602d01323cbbdaa521c16d37 SHA-256: ad76127d21b4dfa6b5a5c7d4a86daccd1c01ef5dbd1fa20e3deaacec230a0f21
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a heuristic indicating an external URI. The embedded document body, though partially garbled, suggests a lure related to 'two main branches of science pdf'. The presence of an external URI points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://zajinet.ru/award?keyword=two+main+branches+of+science+pdf
    • https://cdn.sqhk.co/murafabu/5kijQhb/mipovakaselit.pdf
    • http://gta-msk.ru/954328248136pbsy.pdf
    • http://ogranicbio.fun/61164607043va9dq.pdf
    • https://cdn.sqhk.co/livaxipovage/dehe9ii/best_nun_puns.pdf
    • https://cdn.sqhk.co/bijozugetav/jcgggjJ/bovilutilaputofinikafixe.pdf
    • https://cdn.sqhk.co/berazanoga/iijUhhf/povis.pdf
    • https://cdn.sqhk.co/lazimafuxuxi/i0idjji/saviwifevudorasarosenegu.pdf
    • https://cdn.sqhk.co/doparibi/cjgCLja/6372237676.pdf
    • https://cdn.sqhk.co/dutigimomana/ipjjgd1/wuwiranasulokosuzex.pdf
    • https://cdn.sqhk.co/lafuwexale/iejaO0C/33194841445.pdf
    • http://megalit-korolev.ru/8915440395qbfkg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5e31f617-2793-418f-9d6e-1154caac5ff0/english_grammar_test_online_app.pdf
    • https://uploads.strikinglycdn.com/files/953e1be6-8161-416a-9dde-ce91e4ef9e77/67117216223.pdf
    • https://uploads.strikinglycdn.com/files/77b06683-4233-438c-9a32-9f5ef83426ec/53411157322.pdf
    • https://s3.amazonaws.com/luborinizu/jabipumefenato.pdf
    • https://s3.amazonaws.com/pavujiniz/coshh_guide_to_hazard_symbols.pdf
    • https://uploads.strikinglycdn.com/files/a6f69d5d-36d1-434c-88cf-d211a060d6a3/inability_to_follow_written_instructions.pdf
    • https://s3.amazonaws.com/wazorixekunafob/bongo_fleva_zilipendwa.pdf
    • https://uploads.strikinglycdn.com/files/5139b770-e05f-4ca7-9e18-6a11e4d04be8/rugepumedesubik.pdf
    • https://s3.amazonaws.com/xezujuxoz/70110926882.pdf
    • https://s3.amazonaws.com/fulosobezur/ge_profile_advantium_120_display_problem.pdf
    • https://s3.amazonaws.com/falejogajir/dupimewipapo.pdf
    • https://s3.amazonaws.com/gisujubolidine/vibaxugomegapavasotizoli.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012e31.bin
0d14e391db7c48298ab25444ea47254a48b8a6e218cb8bdc408340e5d669ff49
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E31 5544 bytes
font_01_sfnt_off000140e5.bin
b3aba1f8b04eaae8842e90dcb346073832bcee113f39fcca21a9c26d75f63d8b
pdf-font-stream PDF embedded font (sfnt) at offset 0x140E5 15364 bytes