Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5e222346a6027d0…

MALICIOUS

PDF

85.9 KB Created: 2021-03-14 21:05:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0c1c3eac6742ae49fa6bb5d6f4bc728 SHA-1: 11f702c54c2312319b43cd2fda66b0159298a534 SHA-256: a5e222346a6027d0e2c6b29b84162f4f2e6f33fe3c85bc8b3a1591d3aaae7c65
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. The embedded URL `https://nipisod.ru/strik?utm_term=how+to+wind+a+waltham+wall+clock` suggests a lure related to clock winding, likely leading to a phishing site or malware download. No scripts were extracted, but the PDF structure itself likely contains obfuscated JavaScript or exploits to redirect the user.

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://nipisod.ru/strik?utm_term=how+to+wind+a+waltham+wall+clock
    • http://pink-echo.club/10147100088rt3z8.pdf
    • http://sdorovie-sustavi.xyz/puromulexevl4uu.pdf
    • http://cccckkkkkdd.space/remington_870_express_magnum_20_gauge_trigger_assemblyp36vh.pdf
    • https://cdn-cms.f-static.net/uploads/4454550/normal_60445be67a052.pdf
    • http://letxxnx.org/hachiman_god_complex3d9ri.pdf
    • https://cdn-cms.f-static.net/uploads/4487632/normal_60120883db8e6.pdf
    • http://instapriz24.site/9511943026eb3tw.pdf
    • https://static.s123-cdn-static.com/uploads/4378856/normal_5fcc5a4030b4b.pdf
    • http://lnstagramsupportinfo.com/que_significa_slip_en_un_carroho72a.pdf
    • http://anyita.space/45716938172c1gzb.pdf
    • http://numberoone.xyz/logarithm_multiple_choice_questions_with_answerseelet.pdf
    • http://ekzo-fruit.ru/37944133810n40c3.pdf
    • https://cdn-cms.f-static.net/uploads/4492918/normal_603afe6c97b80.pdf
    • https://static.s123-cdn-static.com/uploads/4424040/normal_5ffbb004881a7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.thdl.org/http://www.thdl.org/Tibetan
    • https://s3.amazonaws.com/tuxexi/relative_clause_worksheet_free.pdf
    • https://s3.amazonaws.com/fusidejebi/con_te_partiro_piano_solo_sheet_music.pdf
    • https://s3.amazonaws.com/jopomodilamego/zewewupirodusod.pdf
    • https://s3.amazonaws.com/loneminovu/spray_de_calendula.pdf
    • https://s3.amazonaws.com/baposivarabuj/duduzavudupisoluku.pdf
    • https://s3.amazonaws.com/bitajemisajoz/tifuwixovoramesopuboze.pdf
    • https://s3.amazonaws.com/tufitijinexu/video_bony_mwaitege_sisi_sote.pdf
    • https://s3.amazonaws.com/gedexim/20992423636.pdf
    • https://s3.amazonaws.com/bopuxosavubare/free_printable_adverb_worksheets_for_5th_grade.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://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.htmlTibetan
    • 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_off0000ed45.bin
b7257212139c73895081c347ca832056357eae6e453a50fd4e3420137f14cb5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED45 5024 bytes
font_01_sfnt_off0000fe46.bin
8e19bb0111db2ae039cf1671ceb2a625bc4fe353e759b27d6fa1765b1ca332cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE46 8732 bytes
font_02_sfnt_off00010f4d.bin
55e98efcc7ebfc4534d69a2a2818a277e9485986d3e6e8b11f897af9c79fd950		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F4D 10668 bytes
font_03_sfnt_off000133db.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x133DB 16204 bytes

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