Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c025e8af5bd4aea…

MALICIOUS

PDF

75.0 KB Created: 2021-03-30 07:45:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 9362141d995a1950c23b197f55593ac5 SHA-1: 3a087fc0ded787b680672eaa02b3a0b7466f06c4 SHA-256: 8c025e8af5bd4aea9e52c664e2e8738e858a55becec6b0a350f66398df1261d1
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The embedded URI 'https://resalured.ru/wix?keyword=babies+r+us+gripe+water' is a strong indicator of a phishing or malware distribution attempt. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of external links and the overall heuristics point towards a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://resalured.ru/wix?keyword=babies+r+us+gripe+water PDF link annotation
    • https://putesoborufo.weebly.com/uploads/1/3/0/8/130814126/sosofuwenenerit-wuruwi.pdfIn PDF document text
    • http://nextauto02.ru/kuzasururuze3hrfi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464077/normal_6024b7f02801c.pdfIn PDF document text
    • http://muldwych.com/example_of_hotel_staff_meeting_agenda4wjsr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495707/normal_603e8daf53087.pdfIn PDF document text
    • https://daginunus.weebly.com/uploads/1/3/4/5/134597638/2711727.pdfIn PDF document text
    • https://marikikugawu.weebly.com/uploads/1/3/5/3/135326377/rirobunewiwefa.pdfIn PDF document text
    • https://ziwagunu.weebly.com/uploads/1/3/4/8/134883986/sanegelodised.pdfIn PDF document text
    • https://deponoma.weebly.com/uploads/1/3/2/6/132696267/muzelorulezapuje.pdfIn PDF document text
    • https://nuvixiravomodi.weebly.com/uploads/1/3/4/5/134516184/d78542ce83c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384316/normal_5fca2ed3de199.pdfIn PDF document text
    • https://puvugemamoj.weebly.com/uploads/1/3/0/9/130969199/lofibomutefedigom.pdfIn PDF document text
    • https://negofajosodin.weebly.com/uploads/1/3/5/3/135314147/4006dd914241.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481273/normal_60187b2f3b47e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388427/normal_5ffbf1a2a739c.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/d54646e1-7226-4f39-832e-e34b430abfed/which_is_the_best_offline_audio_bible.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/ponytail_palm_planting_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/singardaan_ullu_all_episodes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f731fa1-ff90-45b1-be05-3c109cdab5ca/no_fear_shakespeare_julius_caesar_act_1_scene_2_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/vikofukaxidigokizifu.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_off0000e688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE688 5236 bytes
SHA-256: 7ffbc70500c9d851e96285d455195cc2b976502b67a732a92382bd8aa6e2cf17
font_01_sfnt_off0000f876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF876 11300 bytes
SHA-256: 685a3b0bf7cc169f43fcbcabb325e9adc540564c462d70c67276d53825f7babb

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