Malicious PDF — malware analysis report

Static analysis result for SHA-256 e42c837b78e1535a…

MALICIOUS

PDF

79.1 KB Created: 2020-12-16 07:47:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: df20d83870856b3c4c7b2047a8076408 SHA-1: 51b53f308334a3338fbb7e512473b1a53fd7000d SHA-256: e42c837b78e1535a31a62947af818de0f98e055159c7a45c4aa0bb4716e6346f
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that leads to a suspicious domain, disguised as a fitness diet plan. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the presence of an external URI is a primary indicator of compromise.

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://trafficel.ru/123?utm_term=jamie+eason+live+fit+phase+1+diet PDF link annotation
    • https://nokurujifeseg.weebly.com/uploads/1/3/4/3/134355409/78a369490f9cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372073/normal_5f8eb334172d2.pdfIn PDF document text
    • https://wimavebitajiki.weebly.com/uploads/1/3/4/6/134609796/1ad3e73973f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484143/normal_5fbdc3d884d1a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370541/normal_5fc6ac2c414e6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484114/normal_5fcbfed100626.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc30710bda9c57a97cc117d/t/5fc9a8291a258d244fda69b6/1607051307399/rank_one_forms_lcisd.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc78235e2afa34b64af20aa/t/5fce0dc6920f47545bba0ee2/1607339464429/jonamadusudapijipaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dad1cef9-e26d-4003-b30c-8f1d6a218c9c/vomuji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edd808d4-222b-46a2-afb4-6541525c31d7/mubilafetirubokif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1454dbf-1081-4453-a73c-162b1efc743b/dasofozim.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_off0000f711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF711 5288 bytes
SHA-256: 2cfbb8a60024e97f09bdd36cd78206301fb2064b0727ad7397af1802aa4bb206
font_01_sfnt_off000108fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108FB 11304 bytes
SHA-256: eb1b066e12753261c4b274bc4ee5ba6de6a0d5c95d1c4f8a1ebe45f9d1991572