Malicious PDF — malware analysis report

Static analysis result for SHA-256 57c0d87e578737be…

MALICIOUS

PDF

77.1 KB Created: 2021-03-11 04:36:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: ee3243e95ff98304d847b5a2b3773208 SHA-1: 560b7a843ce1421a8f4dd353ba3d9a9cb4be887e SHA-256: 57c0d87e578737bebf3be5e0143862d44a2908c2f32a35d90fec72fab83c0c49
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'druttle.ru', which is likely a malicious domain. The document body, though heavily obfuscated, contains text related to movie songs, suggesting a lure to entice users to click the embedded link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/123?utm_term=bichhoo+movie+songs+hd+1080p PDF link annotation
    • https://cdn.sqhk.co/nigudovowa/gck4sje/homescapes_cheat_codes_android.pdfIn PDF document text
    • https://cdn.sqhk.co/sofizagumup/hNhcdhc/siwokaxapuvusate.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484115/normal_6034d336b8c9a.pdfIn PDF document text
    • https://cdn.sqhk.co/jasurisunav/if7iaRr/bumalivaxosizalov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407070/normal_601359640093f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377125/normal_602d3970e0441.pdfIn PDF document text
    • https://cdn.sqhk.co/pikukafil/hdchcq2/phage_therapy_clinical_use.pdfIn PDF document text
    • https://cdn.sqhk.co/gebunemif/Hhc0Jif/gladiator_glory_duel_pvp_arena_fighting_warriors.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426416/normal_5fde7203db959.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/lanorolowu/rebosapedoj.pdfIn PDF document text
    • http://medesoteruf.rf.gd/mariji.pdfIn PDF document text
    • http://moferamobonar.epizy.com/diredunazabu.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/statistics_david_freedman_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lowebemuwojiso/23330596268.pdfIn PDF document text
    • http://jufakoxageponuz.rf.gd/vtech_kidizoom_duo_camera_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/85594849374.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/58248934331.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/android_install_apk_using_adb.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/95537613295.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/lsat_prep_test_11_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/peer_gynt_suite_1_imslp.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off0000ef7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7C 5644 bytes
SHA-256: 0bae1601fc92f4f63a43e54b02f4ab0d70aa78750dfd69d53501f4f943906822
font_01_sfnt_off000102ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AC 10848 bytes
SHA-256: 1b0cf8891854aaf946b7f3b1d59c654a3d2973da490a7e95a14dd2af5d9cd662

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