Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fd1f759856e85a7…

MALICIOUS

PDF

66.4 KB Created: 2020-12-18 00:54:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 86b34afa5e440f2989dbbfb5d78c7bf8 SHA-1: d3d310a8ddb135520fbbc7fb9d26c59259d8a253 SHA-256: 3fd1f759856e85a79a50a1d2d745c837a53ccc930080aa04d7b355559e775ee5
96 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, likely intended to redirect the user to a phishing site. The document body, though heavily obfuscated, appears to contain metadata related to its creation, including the URL, suggesting a phishing lure.

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://trafffi.ru/aws?utm_term=cookie+sheet+bending+in+oven PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383797/normal_5fa87f851524f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407100/normal_5f9b2db52ce7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406454/normal_5fb9f632cd2d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_5f8d13e26d822.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413019/normal_5fd6aa20d4def.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465270/normal_5fadabc124a72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501484/normal_5fbf0ff45bc7a.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/gumegulaxi/wegirakonim.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/13089143324.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/tera_happy_birthday_audio_song_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f126526-8cbe-46ad-a138-2e2850d38daa/themes_for_google_slideshow.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/android_adb_am_start_settings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91f11090-fa1a-49db-8706-952ef68d4b5c/fagagexopuxegovelofo.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/rwby_wiki_jnpr.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/vamimojagug.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/anita_raj_photo.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_off0000cb00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB00 4920 bytes
SHA-256: 6725bcaea53cbd98ea246d9f552330e2b846f01ccbe82e246192284ef0fc522e
font_01_sfnt_off0000dbbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBE 9728 bytes
SHA-256: 212677afd1c03cd66d4f303536d46a4f305704c4db61059355407e4e1f86a766

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