Malicious PDF — malware analysis report

Static analysis result for SHA-256 3167573d35868aec…

MALICIOUS

PDF

82.1 KB Created: 2021-05-24 07:30:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 99247c77fd5d8d29393d871120ea9fb5 SHA-1: e68abce3de3474d95f3ff3318b9fd81e2cb486f2 SHA-256: 3167573d35868aec43ab0756a23c843a9c0c1788415aaf28b3c1b5d779de292f
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to a suspicious domain, which is also listed as an IOC. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URL suggest an attempt to redirect the user to a malicious site.

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
  • 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://lozipotod.ru/strik?utm_term=cookie+clicker+infinity+sugar+lumps+hack PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481993/normal_6049837437f3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413242/normal_602128ac5c851.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404965/normal_60002a2d236de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451736/normal_606e24d2b7c3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407327/normal_6047fc211f997.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426822/normal_6042e9a52f265.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370063/normal_5fe1c76b279f5.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/b44fe3ad-6645-4efd-bb38-1aec8830924e/how_to_install_stanley_wet_dry_vac_filter_bag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7cf504e-8cd5-4c15-b784-e0f1c48445b7/92082962997.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/oxford_dictionary_for_mobile_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56aa5a22-045a-42bf-b251-8c1e6055df86/megesalumavutenajemar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26b072cb-e389-4c51-a4f5-75ccc3bb531f/how_do_i_invest_in_money_market_funds.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/lidovowirak.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/what_religion_says_yahuah.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69cee97e-6510-41e9-8e0a-deb532f6b685/78300723957.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/java_apache_poi_generate.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/useful_vocabulary_for_ielts_speaking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0c06d90-5e1a-4120-a411-f527be53a511/how_to_update_page_numbers_in_table_of_contents_in_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f88fce7b-fe16-4c28-be5d-ed6eebec6577/11811940112.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80a739ef-1beb-4fe3-be21-ce45eaee4e79/mepexumitewigokedude.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_off0000f2c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C5 5204 bytes
SHA-256: 15a6426d39e3a4bf87222397c93f96f50846f206481896355a5c2cf79ac472cc
font_01_sfnt_off000104f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F3 5500 bytes
SHA-256: 22e331a03a996654fa15bd6ca1f9e40274d508869b8d38d9ba4cb1bd65f827c0
font_02_sfnt_off0001178e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1178E 10252 bytes
SHA-256: 2859e0b99d52e385cb47d5109cfeee23354b916359283241e460637dc36f65b2

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