Malicious PDF — malware analysis report

Static analysis result for SHA-256 63c5c7856d2523da…

MALICIOUS

PDF

72.9 KB Created: 2020-12-22 14:14:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 72ca12ed696fb5aed53aad8126be69bc SHA-1: 9688b7401afe1be7c3e9731b9704b94672a51e58 SHA-256: 63c5c7856d2523da203c425306698ad4b93c58b01360dc2e09fc1751bbf4464d
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The embedded URL `https://trafffi.ru/aws?utm_term=aldi+us+application+form` is presented in a context that impersonates an Aldi application form, suggesting a phishing attempt to trick the user into visiting the malicious site. No scripts were extracted, but the PDF structure and URL are strong indicators of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=aldi+us+application+form PDF link annotation
    • https://wigowaziralo.weebly.com/uploads/1/3/4/4/134498628/xiwavedabok_tunemurima.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380213/normal_5f8f57397bfaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370264/normal_5f9ea23431ceb.pdfIn PDF document text
    • https://figuzenage.weebly.com/uploads/1/3/4/4/134472600/38533a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367643/normal_5f8a8a791bc2d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481423/normal_5fcca9f18874f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fc4e08e8787e879898555ed/t/5fd08e638f1ddd5ccbdf6c34/1607503460560/chicken_run_full_cast_imdb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e8fa3f7-e918-4525-a659-d8ae71a7a79e/lizopogulivuzaw.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3769dc89e1c4b8fcecae8/t/5fc79629efc65c5b7a4775ce/1606915626281/80s_90s_music_genres.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/11600782847.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD257 5052 bytes
SHA-256: cec1b6004ce16056758480edf4585b75583bfd88d0a38b7563ca73ab7067b9ac
font_01_sfnt_off0000e35c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35C 11028 bytes
SHA-256: 8c0c74738169b327c46eab9390cdda8d7e3d0df4014706b334f8df7e2d708a9f
font_02_sfnt_off000108cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108CD 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c