Malicious PDF — malware analysis report

Static analysis result for SHA-256 a09130d993c78da2…

MALICIOUS

PDF

78.9 KB Created: 2021-03-18 06:46:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92523142fcc18f397838db2a1703bcdc SHA-1: ee5fedbd2c5702789d967b0497043c6636a22cae SHA-256: a09130d993c78da27ff6fe72723af394c2345da20d2958e1dc36bb21400cf7b3
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified as malicious by multiple heuristics and a machine learning classifier. The document body, though heavily obfuscated, suggests a technical topic ('Diagrama de operaciones de proceso simbología'), which is likely a lure. The presence of an external URI and the ClamAV detection strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pelibifir.ru/wix?keyword=diagrama+de+operaciones+de+proceso+simbolog%25C3%25ADa
    • http://artistichomesolutions.com/3282733102365ees.pdf
    • http://neo-tp.ru/blackbird_beatles_sheet_musics1xd0.pdf
    • https://rodibafabe.weebly.com/uploads/1/3/0/7/130738722/furomam-tavimefa-sozedogororugi.pdf
    • https://static.s123-cdn-static.com/uploads/4416504/normal_5fcecbbb8f430.pdf
    • https://cdn-cms.f-static.net/uploads/4409246/normal_603376161eb11.pdf
    • http://usecabinets.xyz/char_broil_performance_475_partsaruwe.pdf
    • https://mefosenide.weebly.com/uploads/1/3/4/7/134715399/lekojubib.pdf
    • https://nasuxixogidipan.weebly.com/uploads/1/3/4/7/134701521/8410538.pdf
    • https://cdn-cms.f-static.net/uploads/4379221/normal_6039178d2774c.pdf
    • https://static.s123-cdn-static.com/uploads/4485436/normal_5ff78e96c114d.pdf
    • http://baffer-shop.space/olympics_2022_location4csn3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/viwoxuz/tencent_buddy_emulator_latest_version.pdf
    • https://b7af6bb9-01eb-4839-ab56-764651de4344.filesusr.com/ugd/2486b5_4fbaf7931b8641b8b69a1c3551ccb784.pdf?index=true
    • https://20c5c781-8c1b-4e8c-9612-04c75f5661e5.filesusr.com/ugd/1d3654_1d80ab79deb5465a9236d850f7d15c4b.pdf?index=true
    • https://39c1d623-eccb-4af0-a86a-15328a2d61f9.filesusr.com/ugd/3cb6cb_8e9de9edac694da284693d16b1c93363.pdf?index=true
    • https://df6a9abb-74f3-47e1-b359-fe6d1019da36.filesusr.com/ugd/7921d2_3990a7db9df84a6e800df5d67035da62.pdf?index=true
    • https://s3.amazonaws.com/wivunonovef/wasosimor.pdf
    • https://s3.amazonaws.com/zonebon/64373298803.pdf
    • https://s3.amazonaws.com/lezerawe/xorowipedijifowozoka.pdf
    • https://s3.amazonaws.com/jesidofefe/gamagatuv.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_off0000f194.bin
17857447d0e956f11bc919c8e205a0c753d4a56b1f3d1edca985c9f2889257fa
pdf-font-stream PDF embedded font (sfnt) at offset 0xF194 5584 bytes
font_01_sfnt_off00010478.bin
15364b8e908528b59c5f7a8326b78b300aafb8c67240659d809a869de854fc52
pdf-font-stream PDF embedded font (sfnt) at offset 0x10478 12044 bytes