Malicious PDF — malware analysis report

Static analysis result for SHA-256 88dbc16dcbef4a3d…

MALICIOUS

PDF

77.9 KB Created: 2021-04-04 15:16:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45fc6f3456e3002370d07407c991a689 SHA-1: 532a6ab51acf8ffe345c7cbc4e5b01913507a524 SHA-256: 88dbc16dcbef4a3d41f8e129c42cf0192c8981a3a4a02926f2aa3d8e8fc14414
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, appears to reference a movie trailer, suggesting a lure for phishing or malware download. The presence of an external URI and the ML classifier's high confidence score indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=a+simple+favor+trailer+subtitulado+espa%25C3%25B1ol
    • http://tigafik.mygamesonline.org/28752222816.pdf
    • https://static.s123-cdn-static.com/uploads/4389384/normal_5feb05977a398.pdf
    • https://cdn-cms.f-static.net/uploads/4484993/normal_60125f3dc1343.pdf
    • https://teraxumafelenug.weebly.com/uploads/1/3/4/7/134747654/2820430.pdf
    • http://rezubodojel.medianewsonline.com/sugofewinuwuzadanotololam.pdf
    • https://static.s123-cdn-static.com/uploads/4477138/normal_5fecf66546875.pdf
    • http://rawoxaxevog.mygamesonline.org/44478933907.pdf
    • https://vamewifajezik.weebly.com/uploads/1/3/5/2/135297159/163fee.pdf
    • https://cdn-cms.f-static.net/uploads/4459624/normal_605707bd4fff3.pdf
    • https://static.s123-cdn-static.com/uploads/4446394/normal_60030b3078f21.pdf
    • http://lugodapamaj.mygamesonline.org/diferencia_entre_acromegalia_y_gigantismo.pdf
    • https://nepokotivo.weebly.com/uploads/1/3/2/8/132814168/zenazuju-wazakopez-filikaw-miguseke.pdf
    • https://cdn-cms.f-static.net/uploads/4483610/normal_602c5900421cb.pdf
    • https://static.s123-cdn-static.com/uploads/4490754/normal_5fdf2045c1e64.pdf
    • https://static.s123-cdn-static.com/uploads/4376127/normal_5ffb0c7053b85.pdf
    • https://tusixifowidafoj.weebly.com/uploads/1/3/1/4/131437116/7121053.pdf
    • https://cdn-cms.f-static.net/uploads/4403679/normal_600fc7d02422d.pdf
    • https://xitukamobem.weebly.com/uploads/1/3/4/6/134643312/ruruzasajikuwo_ladakudigas_wonukipe_wusibarakoxunu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/73b28f9a-573d-42dc-97d8-1622d0d2e3c4/61006448950.pdf
    • https://uploads.strikinglycdn.com/files/237e4b6c-a2d3-450b-a4d3-7dacf2983547/gasefu.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_off0000eccf.bin
89dc7c9470fc94b9c60791c586af10434c23c3e26eaff336f79c84a264585657
pdf-font-stream PDF embedded font (sfnt) at offset 0xECCF 5588 bytes
font_01_sfnt_off0000ff78.bin
8e59d1e82545d6ab597e644cc34de8e23a5a15fce22fd70229269ecceee6fe6c
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF78 12228 bytes