Malicious PDF — malware analysis report

Static analysis result for SHA-256 62a8e7b4c4669ad6…

MALICIOUS

PDF

64.1 KB Created: 2020-11-13 02:44:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 4ea670d220c4f87b330656ff611fe39e SHA-1: 48234a8c6099d006fe5ec4db0d0cb45065963515 SHA-256: 62a8e7b4c4669ad63c1f052c74d6d86a0e98777f70401e1be0b1071a46abf45e
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 URL pointing to 'trafftec.ru', which is likely used to deliver a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, contains references to 'Hampton bay doorbell model wl-108 manual', suggesting a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/123?utm_term=hampton+bay+doorbell+model+wl-108+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403415/normal_5f9f5ad0cebe6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410953/normal_5f93d45a3acb3.pdfIn PDF document text
    • https://wopeduvolevim.weebly.com/uploads/1/3/0/7/130776212/xalutos.pdfIn PDF document text
    • https://roxoxurapu.weebly.com/uploads/1/3/4/3/134307884/jizowa_bured_pumipobif_fozarefudoli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409114/normal_5f98f6076be60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413973/normal_5f98f6c6af097.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449205/normal_5fa4440b9436c.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/pasawexawinogad/finding_the_inverse_of_a_matrix_calculator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7f2d066-a957-43b9-9676-79dd0a87b6f3/physical_chemistry_10th_edition_solu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e26dbe7-5734-41dd-a5f4-c47c7e9999da/galeketodel.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/vuguj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcaaa5e1-5e9a-40ff-9f22-a995d63b6367/21518108163.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9c5ba40-2bb2-4cf0-8711-2434bbbcc619/37851535642.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54fb9d52-b8bb-407c-8e40-e7c1f10717ba/gimozavali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f5b6446-2038-4d92-80e9-898aa37d4351/8888468528.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/caterpillar_worksheets_kindergarten.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/32692610621.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_off0000b4c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4C3 5640 bytes
SHA-256: ca6339fd0735b36ccdcb705d19dadede459d38f5d5892f409ff3cc17393cc3f1
font_01_sfnt_off0000c7f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F0 2048 bytes
SHA-256: 2f430097b0e4e500d7174239800a4340685bc181b3707dff1089dac455c017f5
font_02_sfnt_off0000d0cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0CF 9996 bytes
SHA-256: 8120eb1bf0e83718b360d7822a6432b164e4dfb5702197a53d44dfbfc3c6fef1

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