Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0143fec4d029549…

MALICIOUS

PDF

87.8 KB Created: 2021-02-03 01:52:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: c1195024f52eeeecafe51b589351d823 SHA-1: e10cf068af6cfa2e1be322b6a75a8f389aa290f8 SHA-256: f0143fec4d0295498affe79563c217b6ed0b58e18ba38ca1b8b373524ed5e01d
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the presence of malicious URLs and the document's deceptive content point towards a phishing lure designed to redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/aws?utm_term=best+thesaurus+dictionary+pdf In PDF document text
    • http://classkaod.ru/the_grapes_of_wrath_study_guide43en7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383165/normal_601474db52ab7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417653/normal_600d6c30450ee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393369/normal_5ffddf4a2e302.pdfIn PDF document text
    • http://menetufebev.22web.org/12019665242.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://s3.amazonaws.com/farokof/gerunezurinujekofel.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/abstract_reasoning_test_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/vmware_esxi_6._7_free.pdfIn PDF document text
    • http://niwuganol.epizy.com/tilenowolidaziza.pdfIn PDF document text
    • http://vukenorap.epizy.com/95378575038.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/android_tablet_with_keyboard_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/70232757275.pdfIn PDF document text
    • http://fonaxipovun.epizy.com/pigavakejojorupenedar.pdfIn PDF document text
    • http://femodizabofowu.epizy.com/appointment_letter_format_for_marketing_consultant.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/html_to_java_library.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_off00010b8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B8D 5244 bytes
SHA-256: ac92deb0023676fb1425853295fa44bbf29b97e5c799fc451a531c87c0c6ac14
font_01_sfnt_off00011d64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D64 11556 bytes
SHA-256: 91281a7a6d27d91c86052dedefb52e4a092839213a9a38a7f592459d388fedf7
font_02_sfnt_off00014438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14438 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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