Malicious PDF — malware analysis report

Static analysis result for SHA-256 16ef49fa1b81067a…

MALICIOUS

PDF

75.6 KB Created: 2021-05-19 09:04:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: a68752c83eaeecfa5df6062563ad7963 SHA-1: 3e57b765b0e1f36a9b63bff642d1530bfe20d37c SHA-256: 16ef49fa1b81067ac54dab39724c0eb7ed14949a14fa8fd04af0769ba6614416
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support its malicious nature. The document body, though heavily obfuscated, likely contains text intended to trick the user into clicking the malicious link.

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://zajinet.ru/strik?utm_term=is+golo+worth+the+money PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388420/normal_603cfd78d0e81.pdfIn PDF document text
    • https://jufesuzukexo.weebly.com/uploads/1/3/5/2/135294717/nimibuta-xakuvup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420930/normal_6056e4441cef0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446499/normal_60641a0d8dfa6.pdfIn PDF document text
    • https://vozupixog.weebly.com/uploads/1/3/4/3/134312338/dolokuwe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465685/normal_5fd30985e2a75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480582/normal_6042df54b97f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378161/normal_605d7a9c3c7b4.pdfIn PDF document text
    • https://ranixujofenak.weebly.com/uploads/1/3/4/0/134016935/rakumoguj-buzugigu-sovapivagalo-dosulev.pdfIn PDF document text
    • https://kuxiwidozerapi.weebly.com/uploads/1/3/4/7/134728536/4218371.pdfIn PDF document text
    • https://popagupo.weebly.com/uploads/1/3/1/4/131407300/4823063.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/22e97245-352e-42cf-9120-5fc5b5e9cd25/exercices_corriges_sur_les_bascules_et_compteurs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b1ee972-6342-4aec-abdb-dd5b7e450568/confessions_st_augustine_goodreads.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ec3f72d-4d5a-4f3e-9c9e-992826e8a4d2/99787912250.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b37f36ff-692a-46bf-a10c-c198628ee723/things_needed_for_a_new_house_checklist.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52ec2151-8a9a-4c1a-8e50-db3994209d82/que_es_composicion_corporal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8108a14b-06b3-4401-834f-86fc556b20bc/sustainable_development_goals_2030_south_africa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a54fcc33-3701-4bcc-8b5c-8131f43c20c2/97606719650.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_off0000eb6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6A 5020 bytes
SHA-256: ba30abd0036c60ac5fbcbac1d270c26a949fdba4166504562ece8b5123703d00
font_01_sfnt_off0000fc68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC68 10916 bytes
SHA-256: 49fedec255822c976224f5ba8957a2094e6717b93087586c33578b63d06c3daa

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