Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a9f87b97ceef1a1…

MALICIOUS

PDF

66.8 KB Created: 2020-12-18 11:37:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e77bb49f75ffaf7a1166dad7c6685dc0 SHA-1: 9bf7eb81e47cd82871cb53efdf247e498dd28183 SHA-256: 3a9f87b97ceef1a109e2bb852d16f7f62078a292b25f08151b88c46ecf9b45cf
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://trafficel.ru/strik?utm_term=ibm+employee+service+center+number PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417653/normal_5fa712647187b.pdfIn PDF document text
    • https://xolawawasaxigu.weebly.com/uploads/1/3/4/5/134587427/gukezem.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388063/normal_5fc9baa783da4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421627/normal_5fbf5b9184ac7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492536/normal_5fc246044ce1a.pdfIn PDF document text
    • https://fadefewili.weebly.com/uploads/1/3/4/3/134316521/545894.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414159/normal_5fc61de341a42.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/gixawetopoli/secondary_education_curriculum_guide_2017.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc39e3c5e8e827d429ee1bf/t/5fcd1c33c836a917f913ca4a/1607277620585/70470427752.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f8872cf09257bd6c6ae2/t/5fcd8613978da30c561564bf/1607304724087/turkey_sandwich_recipe_with_avocado.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/app_that_gives_you_homework_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc64fea085bf90c0e22058c/t/5fccb530c836a917f9093ea3/1607251253004/magical_park_mclaren_vale.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_off0000c890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC890 5108 bytes
SHA-256: 63e29f28dc4bdbb31e0ff1daa120544e355214654697d2fb7aec4ba8cc2ac406
font_01_sfnt_off0000d9eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9EB 10756 bytes
SHA-256: f41c09151a641dc83c4254f8775fa72d6e1393554b7fba57c15dd871d6aa5ed0